Huge Changes! So much works now!

Both of these new updates let you force the program to generate all of
the outputs (backprojection and thetaspectrum right now)!
((BOTH MAY HAVE THE VERY SERIOUS ISSUE OF RECURSIVELY LOOPING OVER ALL
.npy FILES AS IF THEY WERE IMAGES.. I will fix that.))
Try:
>>>python rht.py folder_name -d
and
>>>python
>>>import rht
>>>rht.viewer(filepath, force=True)
Merge pull request #4 from Schudel888/master

Huge Changes! So much works now!