make HTML features, by default, have arrowheads
make HTML features, by default, have arrowheads

limeng12/jbrowse,SuLab/jbrowse,Arabidopsis-Information-Portal/jbrowse,limeng12/jbrowse,GMOD/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,GMOD/jbrowse,limeng12/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,limeng12/jbrowse,Arabidopsis-Information-Portal/jbrowse,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,SuLab/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,limeng12/jbrowse,SuLab/jbrowse,erasche/jbrowse,SuLab/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,erasche/jbrowse,Arabidopsis-Information-Portal/jbrowse,erasche/jbrowse,GMOD/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,nathandunn/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,Arabidopsis-Information-Portal/jbrowse,SuLab/jbrowse,Arabidopsis-Information-Portal/jbrowse,GMOD/jbrowse,erasche/jbrowse,nathandunn/jbrowse,GMOD/jbrowse,Arabidopsis-Information-Portal/jbrowse,SuLab/jbrowse,erasche/jbrowse,erasche/jbrowse,SuLab/jbrowse,limeng12/jbrowse,limeng12/jbrowse,nathandunn/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,limeng12/jbrowse,nathandunn/jbrowse,nathandunn/jbrowse,erasche/jbrowse