* SSEd HMM_MultiplyMat4 and HMM_Transpose. And added HMM_LinearCombineSSE
* Maybe Travis doesn't support SSE?
* Fix compile process so the SSE option is consistently defined
* Fix link error
* Documentation
* Added function prototype for operator ==
* Added != operator for hmm_vec2, hmm_vec3, hmm_vec4
* Add C versions of equality checks
Also made the C++ tests actually run...😳
* Update documentation
