Combine gff features for non-indexed files.  Fixes #246
Combine gff features for non-indexed files.  Fixes #246

igvteam/igv.js,NabaviLab/CNV-Visualizer,NabaviLab/CNV-Visualizer,NabaviLab/CNV-Visualizer,NabaviLab/CNV-Visualizer,igvteam/igv.js,NabaviLab/CNV-Visualizer