Resolved #1

Colour test for Curses with Ruby 2.0.
Fix whitespace
Curses FPS Test code

Resolves ~30+ FPS. Changing colour is the major killer (using a single
colour nets around 60FPS).
Audio proof-of-concept: plays .wav files

Windows only, sadly.
Resolve #2: we can build an EXE with ocra
For #2: Created build script to create release
#6: Isolate Curses code

It's now in the `Display` class. Also, renamed the main file to `main`
(from `test`)
Resolve #6: isolate audio code