GitLab

- rename transforms submodule to transformations
- Add a Transformation class which wraps the actual transform class
- Derive and implement RGRGTransformation
- Add tests

- Merge _get_transform_override and _get_transform
- Move check_codomain for rg_space to Transform as a staticmethod
- Add tests for transforms

Replace all occurances of np.prod shape to it's faster alternative.



See merge request !17

Added functionality for multiple field_types per field.

Therefore made the Field_type base class more advanced.
Added default field dtype to nifty configuration.

Merge branch 'feature/field_multiple_space' of gitlab.mpcdf.mpg.de:ift/NIFTy into feature/field_multiple_space

Added first version of field_type classes.

# Conflicts:
#	test/test_nifty_spaces.py

Condensed functional structure in nifty_fft.py.