Allow loading session by drag&drop.  Fixes #291
Allow loading session by drag&drop.  Fixes #291

amwenger/igv,amwenger/igv,igvteam/igv,igvteam/igv,igvteam/igv,igvteam/igv,amwenger/igv,amwenger/igv,amwenger/igv,igvteam/igv