Added new monochrome derivatives of the full logo. Changed the
application icon to one that complies with the design guidelines more.
Added an about dialog that will take the user to all of the licenses and
websites relevant to the app (accessed via the information panel in the
slide-out menu). Implemented the new PreferenceActivity,
all previous preferences are back and functional. Began the
implementation of the Restaurant browser and the restaurant fragment
that will show the restaurants information. Created placemarkers for
core functionality that will be edited later on once the algorithms and
server-side coding is finished.

Signed-off-by: Conrad Haupt <me@conradhaupt.co.za>