Add cross-correlation parameterization of RSD
Add semicolons after usage strings
Add distortionMultipole function
Refactor sbTransformWork a bit
Remove unused code
Add distortionMultipoleFunction
Start cleaning up sbTransform by introducing options
sbTransformWork uses a callback to get its Pl(k)
Add distortionModel support to sbTransform
Add createCorrelationFunction
Replace distortionMultipole with more general projectMultipole
Add createCorrelationMultipole
Add padding to avoid interpolation at endpoint warnings