* Add coverage features and add it, laboriously, to everything
* Fix easy tests
* Add tests for != operators
* Clean up test framework a little
* Add documentation of coverage macros
* Fix tests for mat4 to quaternion
* Slightly improve formatting of coverage output
* Trailing whitespace must die
* 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
* Handle zero-vector normalization.
When normalizing a vectors, we have to check whether vector length is
not zero, to avoid dividing by zero when normalizing zero-vectors.
* Test for normalization of zero vectors
* Switch to custom unit testing that is compatible with C
* Remove Google Test framework
* Attempt to fix missing math functions
* Link against C math library
* Try forcing c99 again
* Include -lm at compile time
* Move -lm argument to the end
* Update README and gitignore
