Added convenience function ipol.interpolate
Added convenience function ipol.interpolate

This function should not only offer a uniform interface for all interpolation classes.
Particularly, it allows to efficiently deal with missing values in the interpolation
source values (i.e. np.nan values) if your input value array contains missing values
which are irregularly distributed over all dimensions of the source value array.

See documentation for further details.

wradlib/wradlib,kmuehlbauer/wradlib,kmuehlbauer/wradlib,heistermann/wradlib,wradlib/wradlib,heistermann/wradlib