Changes: Icon, Voice Trigger, Removed Bloat, Added Ant Build File

- Added a nice dice icon instead of that default Android crap
- Changed voice trigger to the more generic 'Roll a die', meaning the user says next 'd-20' or 'd-6' or whatever. Feels more normal this way.
- Removed all the unnecessary images and drawables that weren't being used
- Added an ant build file, because I like building debug versions from command line as opposed to Android export in Eclipse