Updated the documentation of the BNF, added logging in a webservice function.

bnf.tex, Parser.py:
- Updated documentaion of the BNF.

webservice.py:
- Added logging to the getGeneAndTranscipt() function.



git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/trunk@111 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1