Player has health, level, exp (which is gained constantly while online)
and ambition (which affects the rate of exp gain). More stats will be
added later. This is mostly just a test implementation. Will clean up
later.
- Moved user interface code to seperate file
- Added a simple wrapper over ebitenui.UI to allow storage of colors
and such
Hopefully this makes it possible for colors to be changed by users in
the future
