update release notes for Wiggle/Density track type, closes #66
update release notes for Wiggle/Density track type, closes #66

igemsoftware/Shenzhen_BGIC_0101_2013,igemsoftware/Shenzhen_BGIC_0101_2013,Arabidopsis-Information-Portal/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,SuLab/jbrowse,Arabidopsis-Information-Portal/jbrowse,SuLab/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,Arabidopsis-Information-Portal/jbrowse,erasche/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,igemsoftware/Shenzhen_BGIC_0101_2013,limeng12/jbrowse,GMOD/jbrowse,nathandunn/jbrowse,erasche/jbrowse,GreggHelt2/apollo-test,limeng12/jbrowse,Arabidopsis-Information-Portal/jbrowse,nathandunn/jbrowse,erasche/jbrowse,erasche/jbrowse,limeng12/jbrowse,erasche/jbrowse,GMOD/jbrowse,Arabidopsis-Information-Portal/jbrowse,nathandunn/jbrowse,nathandunn/jbrowse,GMOD/jbrowse,GreggHelt2/apollo-test,limeng12/jbrowse,limeng12/jbrowse,limeng12/jbrowse,erasche/jbrowse,GreggHelt2/apollo-test,erasche/jbrowse,SuLab/jbrowse,igemsoftware/Shenzhen_BGIC_0101_2013,GreggHelt2/apollo-test,limeng12/jbrowse,GreggHelt2/apollo-test,Arabidopsis-Information-Portal/jbrowse,SuLab/jbrowse,GreggHelt2/apollo-test,igemsoftware/Shenzhen_BGIC_0101_2013,GreggHelt2/apollo-test,limeng12/jbrowse,GMOD/jbrowse,Arabidopsis-Information-Portal/jbrowse,SuLab/jbrowse,erasche/jbrowse,SuLab/jbrowse,GMOD/jbrowse,SuLab/jbrowse,nathandunn/jbrowse