Added documentation to WCS wrapper base class
Added documentation to WCS wrapper base class

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