GitLab

Revised SmoothOperator implementation.



See merge request !28

- Move kernel construction to after transform
- Use d2o.arange for distance_array method in HPSpace and GLSpace

-> A Field on a PowerSpace can now be initialized with a spectral function.

Lm space complex transforms v2



See merge request !27

Started to consolidate the code base of LM <-> GL/HP transformations.

compute_k_array is still missing.

- Refactor _smooth_helper
- Remove inplace property
- Rename method compute_k_array to distance_array in RGSpace
- Fix compute_k_array usage

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

# Conflicts:
#	nifty/field.py