unfuck things up, clarify abstraction
THERE WE GO. Architecture changes done.
some architectural changes in rules, robustness
Merge pull request #26 from vijoc/julia

Julia
rand.nextInt(n) is exclusive, whoops
Merge pull request #27 from jukkae/boids-tweaks

Boids tweaks
Add some controls to JuliaScene.

Pressing space will toggle the function. Up/down keys change the number
of iterations, and 'd' toggles the debug info.