Initial commit
added all files
 started working on RSS code
working get_fit function
before unraveling np functions in get_fit
changed from 312 to 300
unraveled np.sums, and slices for a_1, b_1
unraveled np.sums, and slices for a_2, b_2
unraveled slices and sums for b_3, a_3
unraveled slices and sums for RSS[j, k]
included finding min RSS in loop
cleaned up fastfit a bit
added pyx etc to Cython_Test
made some changes for debugging -- fastfit giving bad plots
some corrections
added lines from working pre unravelled branch
not working, abandoning and going back to pre un ravelled working py version
so far so good
still looks good -- pre pyx
getting rid of the masked array, include finding min RSS in main loop.  looks good