Adding test for aperture plot, it only test whether it runs without a problem
Fixing bug in RectangularAnnulus plot
Add check for matplotlib existence
updating travis.xml to allow matplotlib tests pass
Merge pull request #205 from bsipocz/aper_test_adding_plots

Adding mock aperture plot tests
Add mad_std function
Add fwhm2sigma function
Move stats to extern
Add sigma_to_fwhm function
Prepend "gaussian_" to FWHM <-> sigma conversion functions
Updates to extern.stat funcs
Hardcode mad_std constant
Merge pull request #209 from larrybradley/stats

Add new mad_std and fwhm2sigma stat functions
Restructured main doc page
Minor doc changes
Add new overview page
Add new installation page
Add new getting started page
Add new background page
Remove width/height attributes for banner logo