v0.4.0

• handle GeometryTypes.Point. (#19)
• add reset!(cache::CollisionCache) function. (#20)
• make runbenchmarks.jl standalone runnable. (#21)
• improve benchmarks, fix type inference issue in projection_weights that led to decreased performance in >= 3 dimensions. (#22)
• minor speedup for penetration_distance. (#23)
• add debug visualizer tool, increase numerical tolerance for projection_weights introduced in #18. (#24)
• assert (with a very large tolerance) that there's no separation (norm of best point) in the penetration case (cheap sanity check for #17). (#25)
• add iteration count to GJKResult, to enable user side max iteration count checks. (#25)
• Simplify penetration_distance (stop using GeometryTypes.argmax). Same performance. (#26)
• breaking: GJKResult API changes. Remove the signed_distance field from GJKResult, add in_collision and weights fields, add separation_distance and simplex_penetration_distance functions (#27).
• Add unexported normal function, which returns a normal given a face (#28)