Made the main and help message.

	 * gitbib.py: Here.
Added prototypes for main functions.

	  * gitbib.py: Here.
Finsihed first draft for configuration class.

		 * config.py: Here.
		 * gitbib.py: Use it.
Made a simple version for the add function.

	 * gitbib.py: Here.
Added a class for an entry in bibtex
Now parse the whole .bib file.

	* bibtexentry.py: Added a fixme about string fields in bib parsing.
	* gitbib.py: Here.
Added search and modified bib format for additionnal fields:

	  * bibtexentry.py: Modified bib format (store in the entry, not as comment)
	  * gitbib.py: Added search
Started the edit function.