COPYING
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     1 		   GNU LESSER GENERAL PUBLIC LICENSE
       
     2                        Version 3, 29 June 2007
       
     3 
       
     4  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
       
     5  Everyone is permitted to copy and distribute verbatim copies
       
     6  of this license document, but changing it is not allowed.
       
     7 
       
     8 
       
     9   This version of the GNU Lesser General Public License incorporates
       
    10 the terms and conditions of version 3 of the GNU General Public
       
    11 License, supplemented by the additional permissions listed below.
       
    12 
       
    13   0. Additional Definitions. 
       
    14 
       
    15   As used herein, "this License" refers to version 3 of the GNU Lesser
       
    16 General Public License, and the "GNU GPL" refers to version 3 of the GNU
       
    17 General Public License.
       
    18 
       
    19   "The Library" refers to a covered work governed by this License,
       
    20 other than an Application or a Combined Work as defined below.
       
    21 
       
    22   An "Application" is any work that makes use of an interface provided
       
    23 by the Library, but which is not otherwise based on the Library.
       
    24 Defining a subclass of a class defined by the Library is deemed a mode
       
    25 of using an interface provided by the Library.
       
    26 
       
    27   A "Combined Work" is a work produced by combining or linking an
       
    28 Application with the Library.  The particular version of the Library
       
    29 with which the Combined Work was made is also called the "Linked
       
    30 Version".
       
    31 
       
    32   The "Minimal Corresponding Source" for a Combined Work means the
       
    33 Corresponding Source for the Combined Work, excluding any source code
       
    34 for portions of the Combined Work that, considered in isolation, are
       
    35 based on the Application, and not on the Linked Version.
       
    36 
       
    37   The "Corresponding Application Code" for a Combined Work means the
       
    38 object code and/or source code for the Application, including any data
       
    39 and utility programs needed for reproducing the Combined Work from the
       
    40 Application, but excluding the System Libraries of the Combined Work.
       
    41 
       
    42   1. Exception to Section 3 of the GNU GPL.
       
    43 
       
    44   You may convey a covered work under sections 3 and 4 of this License
       
    45 without being bound by section 3 of the GNU GPL.
       
    46 
       
    47   2. Conveying Modified Versions.
       
    48 
       
    49   If you modify a copy of the Library, and, in your modifications, a
       
    50 facility refers to a function or data to be supplied by an Application
       
    51 that uses the facility (other than as an argument passed when the
       
    52 facility is invoked), then you may convey a copy of the modified
       
    53 version:
       
    54 
       
    55    a) under this License, provided that you make a good faith effort to
       
    56    ensure that, in the event an Application does not supply the
       
    57    function or data, the facility still operates, and performs
       
    58    whatever part of its purpose remains meaningful, or
       
    59 
       
    60    b) under the GNU GPL, with none of the additional permissions of
       
    61    this License applicable to that copy.
       
    62 
       
    63   3. Object Code Incorporating Material from Library Header Files.
       
    64 
       
    65   The object code form of an Application may incorporate material from
       
    66 a header file that is part of the Library.  You may convey such object
       
    67 code under terms of your choice, provided that, if the incorporated
       
    68 material is not limited to numerical parameters, data structure
       
    69 layouts and accessors, or small macros, inline functions and templates
       
    70 (ten or fewer lines in length), you do both of the following:
       
    71 
       
    72    a) Give prominent notice with each copy of the object code that the
       
    73    Library is used in it and that the Library and its use are
       
    74    covered by this License.
       
    75 
       
    76    b) Accompany the object code with a copy of the GNU GPL and this license
       
    77    document.
       
    78 
       
    79   4. Combined Works.
       
    80 
       
    81   You may convey a Combined Work under terms of your choice that,
       
    82 taken together, effectively do not restrict modification of the
       
    83 portions of the Library contained in the Combined Work and reverse
       
    84 engineering for debugging such modifications, if you also do each of
       
    85 the following:
       
    86 
       
    87    a) Give prominent notice with each copy of the Combined Work that
       
    88    the Library is used in it and that the Library and its use are
       
    89    covered by this License.
       
    90 
       
    91    b) Accompany the Combined Work with a copy of the GNU GPL and this license
       
    92    document.
       
    93 
       
    94    c) For a Combined Work that displays copyright notices during
       
    95    execution, include the copyright notice for the Library among
       
    96    these notices, as well as a reference directing the user to the
       
    97    copies of the GNU GPL and this license document.
       
    98 
       
    99    d) Do one of the following:
       
   100 
       
   101        0) Convey the Minimal Corresponding Source under the terms of this
       
   102        License, and the Corresponding Application Code in a form
       
   103        suitable for, and under terms that permit, the user to
       
   104        recombine or relink the Application with a modified version of
       
   105        the Linked Version to produce a modified Combined Work, in the
       
   106        manner specified by section 6 of the GNU GPL for conveying
       
   107        Corresponding Source.
       
   108 
       
   109        1) Use a suitable shared library mechanism for linking with the
       
   110        Library.  A suitable mechanism is one that (a) uses at run time
       
   111        a copy of the Library already present on the user's computer
       
   112        system, and (b) will operate properly with a modified version
       
   113        of the Library that is interface-compatible with the Linked
       
   114        Version. 
       
   115 
       
   116    e) Provide Installation Information, but only if you would otherwise
       
   117    be required to provide such information under section 6 of the
       
   118    GNU GPL, and only to the extent that such information is
       
   119    necessary to install and execute a modified version of the
       
   120    Combined Work produced by recombining or relinking the
       
   121    Application with a modified version of the Linked Version. (If
       
   122    you use option 4d0, the Installation Information must accompany
       
   123    the Minimal Corresponding Source and Corresponding Application
       
   124    Code. If you use option 4d1, you must provide the Installation
       
   125    Information in the manner specified by section 6 of the GNU GPL
       
   126    for conveying Corresponding Source.)
       
   127 
       
   128   5. Combined Libraries.
       
   129 
       
   130   You may place library facilities that are a work based on the
       
   131 Library side by side in a single library together with other library
       
   132 facilities that are not Applications and are not covered by this
       
   133 License, and convey such a combined library under terms of your
       
   134 choice, if you do both of the following:
       
   135 
       
   136    a) Accompany the combined library with a copy of the same work based
       
   137    on the Library, uncombined with any other library facilities,
       
   138    conveyed under the terms of this License.
       
   139 
       
   140    b) Give prominent notice with the combined library that part of it
       
   141    is a work based on the Library, and explaining where to find the
       
   142    accompanying uncombined form of the same work.
       
   143 
       
   144   6. Revised Versions of the GNU Lesser General Public License.
       
   145 
       
   146   The Free Software Foundation may publish revised and/or new versions
       
   147 of the GNU Lesser General Public License from time to time. Such new
       
   148 versions will be similar in spirit to the present version, but may
       
   149 differ in detail to address new problems or concerns.
       
   150 
       
   151   Each version is given a distinguishing version number. If the
       
   152 Library as you received it specifies that a certain numbered version
       
   153 of the GNU Lesser General Public License "or any later version"
       
   154 applies to it, you have the option of following the terms and
       
   155 conditions either of that published version or of any later version
       
   156 published by the Free Software Foundation. If the Library as you
       
   157 received it does not specify a version number of the GNU Lesser
       
   158 General Public License, you may choose any version of the GNU Lesser
       
   159 General Public License ever published by the Free Software Foundation.
       
   160 
       
   161   If the Library as you received it specifies that a proxy can decide
       
   162 whether future versions of the GNU Lesser General Public License shall
       
   163 apply, that proxy's public statement of acceptance of any version is
       
   164 permanent authorization for you to choose that version for the
       
   165 Library.