Installation script corrections on OS X 10.8.5 and MacPorts
Merge pull request #26 from usuthu65/master

Installation script corrections on OS X 10.8.5 and MacPorts

tested on the fly. Blame Phil if it doesn't work ;-)
added fileName to the MapCnv object
Merge branch 'master' of https://github.com/vtsuperdarn/davitpy
switched as many dep as possible to pip instead of port
changes to plotMapGrd
added mlat and mlon options to calcFitCnvVel function
minor changes to plotMapGrd
added rangeLimit keyword
added model keyword to overlayFov
added title keyword to musicFan, adjusted colorbar size
made information plots in RTI optional
change info_plots keyword
made RTI title plotting optional
added custom cbar_yticks keyword to RTI
added cbar customization
added axis access to plotFullSpectrum
added more cbar customization to musicRTI
added colorbar customization to plotFullSpectrum
changed label on fullSpectrumPlot