Themes? Themes? How exciting!
Add a theme preference. TODO holo, etc

inb4 gnustomp
Fix naming before @keepcalm444 commits again
Remove iml, nav drawer works
1. I promise I will not use canary builds while developing.

Gradle 0.13 saves lives.
Add dark drawables for the nav drawer

<3 ImageMagick
Use dark drawables
Fix cards and drawer
Color themes, fix toolbar
Theme DebugActivity, cleanup
Neaten out the colour handling.
Rename colours for @gnustomp's benefit, fix segfaults

Fun fact: Dalvik disapproves when you set a theme to itself.
DO NOT MERGE: Change theme after exit from SettingsActivity, fix bugs.
PROBABLY MERGE: You can now open settings multiple times! Congrats.
Fix le crash :+1::shipit:
Fix a couple of crashes
Improve colours in places
further improve styles in countdown
update .gitignore
Improve layouts, remove ClassInfoActivity