added ToMayaCurvesConverter
Using handles instead of strings when validating the DetailSplitter.

This change improved a 50 frame cache of a 3 million poly asset (2600 names) from 20min to 16min.
Merge pull request #200 from andrewkaufman/splitterHandles

Using handles instead of strings when validating the DetailSplitter.
Merge pull request #199 from davidsminor/toMayaCurvesConverter

added ToMayaCurvesConverter