Add default courses and coursegroups in database
added implmentation of update method to course
Merge branch 'master' of https://github.com/KUTCO/SchoolHub
split up databse query
added link between book and user
added bug DAO bug fix
added an other bug DAO bug fix
Bookshop method added
Merge branch 'Nick'
added db sql files
Merge branch 'Authentication'
added tavis support
? Merge branch 'master' of https://github.com/KUTCO/SchoolHub
Added 2 books in database
Merge branch 'master' of https://github.com/KUTCO/SchoolHub
Fix a name conflict.
Merge branch 'master' into Authentication