* Add timetable entities, synchronization and UI
* Add better code hub config
* Update SDK tools
* Change activity to ui
* [API] fix lesson room, when division into groups
* [API] Rewrite lesson parser
* [API] Add support for new lesson type
* [API] Fix for substitutions in the timetable
* Fix bug with the number of grades in snackbar
* Add basic grade notification
* Add notification icons
* Add intent to notification
* Improve login activity appearance
* Improve dashboard appearance
* Small amendments
* Change splash logo
* Add swipe refresh layout
* Remove indicator and change border position
* Add snackbar for new grades and rename classes of synchronization
* Add info of the number of grades
* Add grades average average
* Add alert of new grades
* Fix crash while refreshing
* Add disappearing alerts
* Optimize res and fix crash
* Update API to version 27
* Change style and remake activity_main layout
* Change to a brighter navigation background color
* Add expandable recyclerView (thoughtbot)
* Add indicator to expandableRecyclerView and empty subject not shown
* Add Dialog Fragment with grade details
