added gsMapSlantRange function
gsMapSlantRange now called when model==GS
fixed indent in gsMapSlantRange docstring
using np.nan for invalid lat/lons under GS model
fixed GS model in radFov.py and musicPlot.py
changed devMusic script
trying to merge master
Put music code back (fixing a merge with master)
fixed music directory structure
created define_limits() and changed beam_interpolation() to work with it
bug fixes for define_limits() and beam_interpolation()
define_limits() and beam_interpolation() now works for time and beam limits
Merge branch 'master' into music
changed methods to camelCase
Merge branch 'master' into music
corrected two of the great circle functions
added local range determination
started plotRelativeRanges() and now pass axis obj to Basemap
first working iteration of relative range plot
added center mark