Rename index file from indef.fr.txt to index.txt to dit Sphinx needs and adjusted conf file in consequence.
Moved images from fr/ to book/ so that images would be in central location for both en and fr books.
This directory contains extra libraries which are needed
to make cubicweb work.
The mx.DateTime python implementation is directly taken from
the mx.DateTime distribution. The only modification is the
strptime function which has been mocked using the standard
``datetime`` module. (as provided by the python2.5's stdlib)