Completed basic password authentication, added registration funcionality,
renamed auth_password to action_login
Merge commit 'ddabfda993392e125936c181c508cf8e80688062'
Added learn_period::get_current_learn_period,
fixed some errors in the backend code,
added some functionality to the timetable page
Added some tables (learn_material, rating, ...) to the workbench model
Merge branch 'master' of https://github.com/jonessen96/libsmo
Merge commit 'a518bfcc75fc2d3402e879c25ff9eb4672f02b83'
Merge branch 'master' of https://github.com/jonessen96/smo-tntnet