Merge pull request #7 from dirkschumacher/master

adds ZSB navigator
Merge pull request #8 from dirkschumacher/master

paul / timetable hotfixes
Merge branch 'master' of https://github.com/dirkschumacher/iUPB
fixes bug #56
Merge pull request #57 from dirkschumacher/new_twitter_api

New twitter api v1.1