move basis.rbf to transform.rbf
RBF's are now Transforms
move interpolation into image
tidy up imports in image
Use versioneer for versioning

The idea is that our versioning should be automatically generated
form our git tagging system. This takes one more step out of
the build process (hopefully).
Merge pull request #293 from jabooth/interpmv

move interpolation into image
Merge pull request #291 from jabooth/rbf

Move RBF functions to menpo.transform, make them Transforms
Merge pull request #296 from patricksnape/versioneer

Use versioneer for versioning