v0.4

Removed all usage of event bus in favor of RxJava
New layout for link comments view
Fixed swipe to refresh
Fixed memory leaks from usage of an infinite back stack
Added dialog when navigating to NSFW subreddits
Displaying subreddit image when navigating to a subreddit
Updated libraries and dependencies
Reply to submissions and comments from link comments view
Deep links from other applications open the correct view
New launcher icon
Lots of other fixes