---minor changes in preparation for changing from WK in time to using
the python correlation function.
---Added choices for interpolation and for zeroing out modes larger than
the BES.
---Changed from using WK in time to using the (slower) python
correlate function since the results look more believable. THIS MAY NOT
BE A WORKING VERSION, since have to push in order to use on another
machine.
Merge branch 'master' of github.com:ferdinandvwyk/python_correlation

Conflicts:
	correlation.py