Removing FITS tools and adding register_series()

Two things here (whoops):

* Remove FITS stuff to make it more stand-alone
* Wrote simple code to align a series of images.  


Things to do here are to use the multiprocessing module to split this up- each image in a series is independent.  

This seems to work well, a upsample factor of 10 is still faster than our java code, and seems to work well.  Furthermore, we get frame by frame metrics of motion, which will be really useful.