Moved extranet's library away from the repo

I also generalised it, you now need to add the url of the extranet.
Merge branch 'master' of https://github.com/cym13/timetable
Merge pull request #3 from nico97118/master

implement "timetable n"
Merging nico's modifications
Finished moving extranet away
Merge http://www.github.com/cym13/timetable

update before pushing full API implementation.