Tracking model (#64)
Tracking model (#64)

* Updates based on testing with real images.  Now only takes non-fpacked fits as input.

* Updates and bugfixes.  Try to make more robust

* Bugfixes

* Make get_pointing_error return tuple of (dRA, dDec, magnitude of separation)

AstroHuntsman/POCS,AstroHuntsman/POCS,AstroHuntsman/POCS,panoptes/POCS,AstroHuntsman/POCS,joshwalawender/POCS,joshwalawender/POCS,joshwalawender/POCS,panoptes/POCS,panoptes/POCS,panoptes/POCS