Cut release 0.13.0rc2.
Cut release 0.13.0rc2.

hustbill/prometheus,fabxc/prometheus,RobertKielty/prometheus,agaoglu/prometheus,dsymonds/prometheus,abhishekamralkar/prometheus,ton31337/prometheus,kzittritsch/prometheus,fabxc/prometheus,fabric8io/prometheus,PrFalken/prometheus,trigrass2/prometheus,thachmai/prometheus,jbdalido/prometheus,adamron1/prometheus,Conorbro/prometheus,GoogleCloudPlatform/prometheus,yanghongkjxy/prometheus,dpatel06/prometheus,sudhi-vm/prometheus,JavierZunzunegui/prometheus,tomwilkie/prometheus,slok/prometheus,gesellix/prometheus,rajthilakmca/prometheus,tattsun/prometheus,cit-lab/prometheus,JavierZunzunegui/prometheus,Colstuwjx/prometheus,trigrass2/prometheus,datajet-io/prometheus,slok/prometheus,wxdublin/prometheus,alileza/prometheus,wrouesnel/prometheus,bluecmd/prometheus,hustbill/prometheus,jimmidyson/prometheus,robbiet480/prometheus,mtanda/prometheus,Stackdriver/stackdriver-prometheus,jbdalido/prometheus,wrouesnel/prometheus,SaltedMan/prometheus-annotated,iksaif/prometheus,GoogleCloudPlatform/prometheus,Conorbro/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,tattsun/prometheus,dpatel06/prometheus,SaltedMan/prometheus-annotated,prasincs/prometheus,fabxc/prometheus,wrouesnel/prometheus,abhishekamralkar/prometheus,thachmai/prometheus,keegancsmith/prometheus,alileza/prometheus,prasincs/prometheus,cit-lab/prometheus,dsymonds/prometheus,q3k/prometheus,gesellix/prometheus,dmilstein/prometheus,PrFalken/prometheus,prometheus/prometheus,Dieterbe/prometheus,PrFalken/prometheus,AlekSi/prometheus,fabxc/prometheus,sudhi-vm/prometheus,dmilstein/prometheus,Conorbro/prometheus,robbiet480/prometheus,tattsun/prometheus,mtanda/prometheus,keegancsmith/prometheus,kzittritsch/prometheus,gesellix/prometheus,datajet-io/prometheus,Colstuwjx/prometheus,jimmidyson/prometheus,iksaif/prometheus,keegancsmith/prometheus,Stackdriver/stackdriver-prometheus,flier/prometheus,yanghongkjxy/prometheus,adamron1/prometheus,dalanlan/prometheus,AlekSi/prometheus,smyrman/prometheus,abhishekamralkar/prometheus,slok/prometheus,jbdalido/prometheus,Stackdriver/stackdriver-prometheus,wrouesnel/prometheus,sudhi-vm/prometheus,tomwilkie/prometheus,kangwoo/prometheus,tomwilkie/prometheus,laushinka/prometheus,gcnonato/prometheus,prasincs/prometheus,iksaif/prometheus,q3k/prometheus,datajet-io/prometheus,Colstuwjx/prometheus,dln/prometheus,jimmidyson/prometheus,rajthilakmca/prometheus,kzittritsch/prometheus,datajet-io/prometheus,alileza/prometheus,wxdublin/prometheus,gesellix/prometheus,SaltedMan/prometheus-annotated,amorken/prometheus,SaltedMan/prometheus-annotated,amorken/prometheus,laushinka/prometheus,gcnonato/prometheus,flier/prometheus,PrFalken/prometheus,agaoglu/prometheus,cit-lab/prometheus,nicr9/prometheus,kangwoo/prometheus,trigrass2/prometheus,dln/prometheus,jmcfarlane/prometheus,gcnonato/prometheus,ton31337/prometheus,dsymonds/prometheus,ton31337/prometheus,bluecmd/prometheus,Gouthamve/prometheus,amorken/prometheus,kzittritsch/prometheus,robbiet480/prometheus,agaoglu/prometheus,yanghongkjxy/prometheus,jmcfarlane/prometheus,alileza/prometheus,thachmai/prometheus,RobertKielty/prometheus,kangwoo/prometheus,wndhydrnt/prometheus,nicr9/prometheus,JavierZunzunegui/prometheus,eliothedeman/prometheus,msiebuhr/prometheus,fabric8io/prometheus,jmcfarlane/prometheus,JavierZunzunegui/prometheus,wndhydrnt/prometheus,mrwacky42/prometheus,Gouthamve/prometheus,bluecmd/prometheus,dln/prometheus,jmcfarlane/prometheus,keegancsmith/prometheus,fabric8io/prometheus,prometheus/prometheus,yanghongkjxy/prometheus,dalanlan/prometheus,dalanlan/prometheus,slok/prometheus,mtanda/prometheus,agaoglu/prometheus,eliothedeman/prometheus,iksaif/prometheus,brancz/prometheus,msiebuhr/prometheus,nicr9/prometheus,rajthilakmca/prometheus,eliothedeman/prometheus,smyrman/prometheus,sudhi-vm/prometheus,adamron1/prometheus,brancz/prometheus,wndhydrnt/prometheus,AlekSi/prometheus,mrwacky42/prometheus,GoogleCloudPlatform/prometheus,q3k/prometheus,smyrman/prometheus,msiebuhr/prometheus,jbdalido/prometheus,keegancsmith/prometheus,q3k/prometheus,hustbill/prometheus,ton31337/prometheus,dln/prometheus,brancz/prometheus,RobertKielty/prometheus,tattsun/prometheus,Gouthamve/prometheus,gottwald/prometheus,prometheus/prometheus,gottwald/prometheus,alileza/prometheus,Gouthamve/prometheus,Colstuwjx/prometheus,thachmai/prometheus,msiebuhr/prometheus,Dieterbe/prometheus,dmilstein/prometheus,prasincs/prometheus,gottwald/prometheus,gcnonato/prometheus,dmilstein/prometheus,laushinka/prometheus,mtanda/prometheus,gottwald/prometheus,dpatel06/prometheus,eliothedeman/prometheus,laushinka/prometheus,cit-lab/prometheus,fabric8io/prometheus,dsymonds/prometheus,abhishekamralkar/prometheus,amorken/prometheus,tomwilkie/prometheus,trigrass2/prometheus,robbiet480/prometheus,mrwacky42/prometheus,rajthilakmca/prometheus,prometheus/prometheus,prometheus/prometheus,smyrman/prometheus,adamron1/prometheus,AlekSi/prometheus,brancz/prometheus,RobertKielty/prometheus,GoogleCloudPlatform/prometheus,flier/prometheus,bluecmd/prometheus,wxdublin/prometheus,Dieterbe/prometheus,Conorbro/prometheus,Stackdriver/stackdriver-prometheus,hustbill/prometheus