Major cleanup #1

- Used Direction enum instead of strings
- Cleaned up imports
- Added git metafiles
- Replaced pythonic if statements with switch/case
Renamed input keys to use camelCase
Merge pull request #1 from oldmud0/cleanup

Cleanup merge #1
Simplified animation and bullet direction
Changed for loops into Iterators
Removed bin folder
Merge pull request #2 from oldmud0/cleanup

Cleanup merge #2
Merged Enemy and Player classes to one abstract Guy class

(why me...)
Remember, use System.err for errors.
More minor cleanups on Ui class
Merged 2 font-related lines
Merge pull request #3 from oldmud0/cleanup

Cleanup merge #3