Fixed Sphinx build severe warnings.
Fixed Sphinx build severe warnings.

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