Animated targets!

It was high time for some new fonts and styles, so in this update:

1. New fonts so you can actually see the text and scores.

2. Custom buttons

3. Code optimisation

4. Basic (placeholder) sound implementation

and the biggie:

5. Animations on gates (only one gate for now)!

Goals for the future:

make a different gate model

make sound effects

Make animation start random (so the animation is not always at the same point when you meet it).

Design new intro gates rather than the ugly ones that are in place now.