Added bibliography of published Ginga papers
Added bibliography of published Ginga papers

Changes to be committed:
        new file:   doc/ginga_papers.bib

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