Add new benchmark for OBB::ClosestPoint(point) performance.
SSE-optimize OBB::ClosestPoint(point) from 89.952 ticks to 24 ticks. Add correctness test.
Add note about profiled performance of negate_ps().
Add benchmark for Frustum_ClosestPoint_Point performance.
Optimize Frustum::ClosestPoint(point) for orthographic Frustums from 32900.7 ticks to 82.192 ticks (scalar) and 57.224 ticks (SSE). Improve test and benchmark.