unfinished... will fixed Drawer first.
Broken. Need to implement cardsUI first.
Merge branch 'feature/implement_cardsui' into develop
Merge branch 'develop' into feature/overhaul_navdrawer
NavDrawer and CardsUI work.
NOT tested on API-8.
Added About Activity.
Merge branch 'feature/overhaul_navdrawer' into develop