Suppression de plasTeX
Converted to Python3

Not fully tested: base case seems to work
Temporary workaround to make babel work
[WIP] LaTeX files are parsed again
Cleaning LaTeX parser
Using logging module
Handling user abort
Deleting output and temporary files generated by yacc
Added intersong example
Simplification
Update setup.py
Start Python2 compatibility mode
Utilisation de python3 par défault
English error message
UTF-8 everywhere, python2 legacy mode
Setting up file type plugins.
Documentation
Indentation
Attempt to silence yacc

Reference #65
Simplification de l'installateur