cleanup of interpolation.py
cleanup of interpolation.py

renamed _prefilter : _buildknots

added docstring to evaluate

removed resample, __call__ methods

removed optional grid keyword: the grid used is self.image.grid

default spline order is 3

alexis-roche/register,alexis-roche/register,alexis-roche/register,bthirion/nipy,arokem/nipy,alexis-roche/niseg,alexis-roche/nireg,nipy/nireg,bthirion/nipy,arokem/nipy,alexis-roche/nipy,alexis-roche/nipy,alexis-roche/niseg,alexis-roche/nireg,bthirion/nipy,nipy/nipy-labs,alexis-roche/nipy,nipy/nireg,arokem/nipy,nipy/nipy-labs,alexis-roche/nipy,arokem/nipy,bthirion/nipy