Updated timeline to use Fragment
Successfully migrated home timeline behavior to its own fragment. Made the static class for a scrolling event handler into a dynamic class.
Adding mentions view that will consume the TweetListFragment
Mentions fragment works to display mentions.
Adds home icons. Adds tab bar.
Project does not load timeline, but the activity bar loads...
Wired up timeline home pane and mentions pane.
Fixed infinite scroll on HomeTimelineFragment
Removing unsuccessful attempt at infinite scrolling as captured in MentionsFragment. Figured out the problem was a mix of calling getMentions and getHomeTimeline. API has been updated to allow multiple signatures for both getMentions and getHomeTimeline.