bugfix to Ruler; use the min it's given, not 0 (really, this was stray debugging code)
bugfix to Ruler; use the min it's given, not 0 (really, this was stray debugging code)

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