Update change log for 0.5
Update change log for 0.5

square/flow,kidaa/flow,venkatesh3007/flow,superboonie/flow,sdelaysam/flow,lynnmatrix/flow,kaoree/flow,pyricau/flow,xfumihiro/flow,mlevytskiy/flow,leasual/flow,Zhuinden/flowless,square/flow,sdelaysam/flow