V2.0

Rehaul adding lots of features:
-Most intensive computations done in parallel
-Separate specification of movie for calculating shifts (e.g. red
channel) and movie to apply shifts to (e.g. green channel)
-Small formatting changes to improve speed (multiple small tiff files
instead of one large mat)
-Modular functions, most elements can be replaced by some custom
processing
-Allows specification of fewer movie segments (only 9, 6, or 4) to save
time.