Workspace file changes.
Basic elements on home page.
Changed name of `textLabel` to `tweetLabel`.
Set profile image.
Resize icons and layout constraints in main Tweet cell.
Set timestamp.
Use NSDate category for getting formatted time ago.
Attributed string for name and screen name.
Show name of original poster for retweets.
Fixed TweetCell autolayout.
Conditionally show retweeted label.
Set retweeted name.
Merge branch 'master' of github.com:ahuang13/ios_twitter