Small changes.

Updated Readme
Look at figures of duplicate and triplicate

duplicate_backproj wlen=41 smr=11 frac=0.75
triplicate_backproj wlen=21 smr=11 frac=0.9
Removed unnecessary things, small changes
UNSTABLE. Changed getData() to also return masks.

Currently having silent errors throughout the new stuff I wrote. Working
on that.
Fixed the big instability, and commented line 699

Seems to run faster since there is less loop overhead. For images with
NaNs, it will run significantly faster by avoiding any of those pixels.
Got a lot to work!

The program should be faster for images containing NaNs now. (The
masking step ignores anything within wlen/2 range of a nan or edge
value.) Force now works.
Updated Plotting Command!

Check it out
Check out new figure/herschel_data.png

New Stuff
Started working on the most recent mask ideas
Mask for smr and wlen implemented separately.

Big changes to window_step(). Removed setParams().
Small changes, frustrated by boundaries still.
Merge pull request #8 from Schudel888/master

New getData() function frontloads a lot of window_step's work. Force works.