Changing app name and icon
hide action bar from launchActivity
Adding sushi background to launchactivity.

Some details: I've added ldpi/mdpi/hdpi/xhdpi assets, cropped for
appropriate resolutions. I initially created .png assets, but the source
is from a 3MB jpg stock photo (maybe uncompressed, but still a lossy format so I don't trust it). Using .png put me at 2MB for the image assets, which is
unacceptably high. I think one of the main advantages of .png is alpha
transparency, and I don't need transparency as it's a background image.
With a high quality JPG (only 80% compression) we're still sitting at near
500kb, which is a bit high, but I'll play around with things more once I'm
comfortable that this won't look ugly on any tested displays.
Adding logo assets. Changing button color.
updating google maps key
Changing package name and regenerating API key.
converting to a maven project
Merge branch 'nommable'