Merge pull request #35 from Rroia/master

Fixed Crash on click on ListHeader and ListFooter
Fixed potential crash
Bugfix - loading bar wasn't showing up in post view
Destroys the web view more aggressively.
Post heading click regression fix
Overrode Android's default 'light' window background gradient
Workaround for the long startup times.
Fixed potential regression when deleting temp files
Tapping comments in the inbox now opens up the context.
Workaround for Android bug - videos should now stop playing in the background after internal browser is closed.
Updated version numbers.
Fix for Android WebView background CPU consumption bug
Significant speed improvements to cache pruning
Now prunes the cache only on app startup
Added build instructions
Added link to build instructions
Added initial support for displaying changelog after update
Fixed username case sensitivity (comment editing should now work in all cases)
Fixed minor account dialog regression
Subreddit loading progress indicator is now a list footer