[changelog] updated the changelog to reflect the recent changes
[changelog] updated the changelog to reflect the recent changes

upfluence/sensu,bf4/sensu,yonglehou/sensu,Tapjoy/sensu-mirror,roobert/sensu,miyakawataku/sensu,solarkennedy/sensu,rbramwell/sensu,crewton/sensu,npe9/sensu,quodlibetor/sensu,sensu/sensu,withnale/sensu,portertech/sensu,pauloconnor/sensu,zuazo-forks/sensu,m4ce/sensu,somic/sensu,javrasya/sensu,cread/sensu,keymone/sensu