Whats new in CubicWeb 3.15

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New functionnalities

--------------------

* XXX david/vmic describe zmq server

* XXX jcr describe zmq communication bus

* Improved WSGI support. While there is still some caveats, most of the code

  which as twisted only is now generic and allows related functionalities to work

  with a WSGI front-end.

* Full undo/transaction support : undo of modification has eventually been

  implemented, and the configuration simplified (basically you activate it or not

  on an instance basis).

API changes

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* The base registry implementation has been moved to a new

  `logilab.common.registry` module (see #1916014). This includes code from :

  * `cubicweb.vreg` (the whole things that was in there)

  * `cw.appobject` (base selectors and all).

  In the process, some renaming was done:

  * the top level registry is now `RegistryStore` (was `VRegistry`), but that

    should not impact cubicweb client code ;

  * former selectors functions are now known as "predicate", though you still use

    predicates to build an object'selector ;

  * for consistency, the `objectify_selector` decoraror has hence be renamed to

    `objectify_predicate` ;

  * on the CubicWeb side, the `selectors` module has been renamed to

    `predicates`.

  Debugging refactoring dropped the more need for the `lltrace` decorator.

  There should be full backward compat with proper deprecation warnings.

  Notice the `yes` predicate and `objectify_predicate` decorator, as well as the

  `traced_selection` function should now be imported from the

  `logilab.common.registry` module.

* XXX pyves describe web auth api change

* XXX pyves describe web test api change

Unintrusive API changes

-----------------------

* new 'ldapfeed' source type, designed to replace 'ldapuser' source with

  data-feed (i.e. copy based) source ideas.

* new 'zmqrql' source type, similar to 'pyrorql' but using ømq instead of Pyro.

* XXX fcayre: new service api

* XXX adim: new ajax controller and ajax function

User interface changes

----------------------

A new 'undohistory' view expose the undoable transactions and give access to undo

some of them.