New Icon. Changed list item appearance.

Added sweet new splashscreen and icon thanks to Aslan. Also comments
icon.
Feed items now show score and author.
Score label on list items changes color based on vote.
Messages tab now populates with data on login.
Removed titlebar from Account view, and made the already present header
the new titlebar.
Pages are destroyed when popped, helps keep app running smoother,
conserve memory.
If needed, captcha image will appear when sending a message.