Barely basic sketch of voronoi impl.
Use rhill's voronoi implementation
Merge branch 'voronoi' into shatter
Generate voronoi regions inside a polygon
Constrain polygons to containing polygons
Constrain voronoi regions to containing asteroid
Fix centroid calculation and correction for asteroids
Correct extra vertices when clipping a polygon
Shatter asteroids on click, including velocity
Missing vector functions
Asteroid shattering with ship missiles
Add blast force and radius to shattering
Explosions and sub-explosions
Ignore particle contacts on bodies that have been removed
Add a bomb
Allow 'down' for firing gun
Fix ship scale/area calculation
Tweak explosions, no more damping
Merge branch 'shatter'
Clean up toggle color