fixes to whip AstropyWCS2 into shape
fixes to whip AstropyWCS2 into shape

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