Update changelog for 0.17.0 release
Update changelog for 0.17.0 release

eliothedeman/prometheus,datajet-io/prometheus,msiebuhr/prometheus,sudhi-vm/prometheus,SaltedMan/prometheus-annotated,GoogleCloudPlatform/prometheus,eliothedeman/prometheus,Colstuwjx/prometheus,agaoglu/prometheus,yanghongkjxy/prometheus,SaltedMan/prometheus-annotated,kzittritsch/prometheus,sudhi-vm/prometheus,brancz/prometheus,adamron1/prometheus,JavierZunzunegui/prometheus,dmilstein/prometheus,dsymonds/prometheus,dsymonds/prometheus,Stackdriver/stackdriver-prometheus,JavierZunzunegui/prometheus,yanghongkjxy/prometheus,GoogleCloudPlatform/prometheus,brancz/prometheus,adamron1/prometheus,Gouthamve/prometheus,PrFalken/prometheus,keegancsmith/prometheus,datajet-io/prometheus,Conorbro/prometheus,sudhi-vm/prometheus,prometheus/prometheus,kzittritsch/prometheus,AlekSi/prometheus,dsymonds/prometheus,agaoglu/prometheus,amorken/prometheus,Gouthamve/prometheus,brancz/prometheus,agaoglu/prometheus,gottwald/prometheus,Stackdriver/stackdriver-prometheus,prometheus/prometheus,alileza/prometheus,ton31337/prometheus,kangwoo/prometheus,msiebuhr/prometheus,Conorbro/prometheus,amorken/prometheus,Conorbro/prometheus,PrFalken/prometheus,SaltedMan/prometheus-annotated,gottwald/prometheus,GoogleCloudPlatform/prometheus,brancz/prometheus,alileza/prometheus,gottwald/prometheus,slok/prometheus,ton31337/prometheus,Colstuwjx/prometheus,SaltedMan/prometheus-annotated,tomwilkie/prometheus,datajet-io/prometheus,gottwald/prometheus,Gouthamve/prometheus,yanghongkjxy/prometheus,alileza/prometheus,keegancsmith/prometheus,eliothedeman/prometheus,PrFalken/prometheus,yanghongkjxy/prometheus,kangwoo/prometheus,adamron1/prometheus,sudhi-vm/prometheus,tattsun/prometheus,AlekSi/prometheus,Colstuwjx/prometheus,slok/prometheus,prometheus/prometheus,kzittritsch/prometheus,amorken/prometheus,GoogleCloudPlatform/prometheus,Conorbro/prometheus,alileza/prometheus,tattsun/prometheus,ton31337/prometheus,Stackdriver/stackdriver-prometheus,tomwilkie/prometheus,AlekSi/prometheus,adamron1/prometheus,tomwilkie/prometheus,kangwoo/prometheus,tattsun/prometheus,kangwoo/prometheus,slok/prometheus,ton31337/prometheus,Gouthamve/prometheus,prometheus/prometheus,tattsun/prometheus,JavierZunzunegui/prometheus,slok/prometheus,dsymonds/prometheus,agaoglu/prometheus,PrFalken/prometheus,eliothedeman/prometheus,keegancsmith/prometheus,dmilstein/prometheus,keegancsmith/prometheus,alileza/prometheus,tomwilkie/prometheus,amorken/prometheus,Stackdriver/stackdriver-prometheus,JavierZunzunegui/prometheus,dmilstein/prometheus,AlekSi/prometheus,Colstuwjx/prometheus,keegancsmith/prometheus,msiebuhr/prometheus,dmilstein/prometheus,msiebuhr/prometheus,GoogleCloudPlatform/prometheus,kzittritsch/prometheus,datajet-io/prometheus,prometheus/prometheus