Applied changes from astropy/package-template#135.
Applied changes from astropy/package-template#135.

stscieisenhamer/ginga,rupak0577/ginga,rupak0577/ginga,pllim/ginga,pllim/ginga,ejeschke/ginga,rupak0577/ginga,stscieisenhamer/ginga,ejeschke/ginga,stscieisenhamer/ginga,naojsoft/ginga,naojsoft/ginga,pllim/ginga,naojsoft/ginga,ejeschke/ginga