Test domains

Since we remap the API between different project, I want to directly compare output of equivalent functions to verify that the mappings are correct.  This branch is a first stab effort to do this.  It is a bit rough around the edges (such as possible dependence on floating point approximation error affecting results) and the code isn't particularly pretty, but it is much better than having nothing.  Hopefully the tests aren't hyper-sensitive resulting in sporadic failures.

By doing this, I learned that `math.fmod` is very finicky, may not be consistent across platforms, and probably isn't the function that the user expects (which would be the mod, or %, function), so it has been removed.

This will also allow for much higher confidence if other API mappings are developed.