Adding ShapeFilter options.

Merge pull request #26 from windo/patch-1

circle: correct OtherShape for circle to circle intersections

Merge pull request #25 from SolarLune/RevampOctober

v0.8.0!

FIX: Object.Update should not remove the object from the space's objects list.

Merge pull request #24 from d3rped/fix/poly_mtv_direction

Merge branch 'master' into fix/poly_mtv_direction

Implement circle projection and fix circle mtv.

Fix faulty projection overlap function.

FIX: MTV for polygons now has the right direction.

temporary

Add Object.SetCenterVec().

Object.Center() now returns a Vector.

Breaking changes.