Adding test for RotationOrderDetector
Adding second detection method within RotationOrderDetector
Adding some additional RotationOrderDetector methods
Adding cusp code
RotationOrderDetector features

* Added additional methods, which can be selected through an enum
  * Harmonic series, with either fixed or floating intercept
  * Single sin^2 or cusp functions, optimizing either amplitude or SSE
* Strong command line interface