Merge pull request #37 from nejc92/master

user authentication with parsing timetable and updating database should work now(of course can't test it on windows...), data models fixed, offer app added
Merge pull request #4 from ipri2013/master

New one
Bug fixed.
Merge pull request #38 from juree/master

Bug fixed.
Changes.
Merge pull request #39 from juree/master

Changes.
Merge pull request #2 from ipri2013/master

Updating my fork