Update CHANGELOG for 0.6.3
Update CHANGELOG for 0.6.3

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identification-io/doorkeeper,mavenlink/doorkeeper,coinbase/modified-doorkeeper,ifeelgoods/doorkeeper,telekomatrix/doorkeeper,Tout/doorkeeper,doorkeeper-gem/doorkeeper,ministryofjustice/doorkeeper,CloudTags/doorkeeper,CloudTags/doorkeeper,EasterAndJay/doorkeeper,stormz/doorkeeper,ministryofjustice/doorkeeper,Uysim/doorkeeper,jasl/doorkeeper,ukasiu/doorkeeper,vanboom/doorkeeper,jasl/doorkeeper,outstand/doorkeeper,CloudTags/doorkeeper,nbulaj/doorkeeper,calfzhou/doorkeeper,AdStage/doorkeeper,ValMilkevich/doorkeeper,identification-io/doorkeeper,mavenlink/doorkeeper,pmdeazeta/doorkeeper,vovimayhem/doorkeeper,kolorahl/doorkeeper,Tout/doorkeeper,6fusion/doorkeeper,dk1234567/doorkeeper,phillbaker/doorkeeper,telekomatrix/doorkeeper,ezilocchi/doorkeeper,nbulaj/doorkeeper,AICIDNN/doorkeeper,ngpestelos/doorkeeper,daande/doorkeeper,vanboom/doorkeeper,daande/doorkeeper,dollarshaveclub/doorkeeper,moneytree/doorkeeper,lalithr95/doorkeeper,dollarshaveclub/doorkeeper,stormz/doorkeeper,ifeelgoods/doorkeeper,GeekOnCoffee/doorkeeper,doorkeeper-gem/doorkeeper,ValMilkevich/doorkeeper,coinbase/modified-doorkeeper,stefania11/doorkeeper,GeekOnCoffee/doorkeeper,kolorahl/doorkeeper,outstand/doorkeeper,vovimayhem/doorkeeper,AICIDNN/doorkeeper,6fusion/doorkeeper,AdStage/doorkeeper,Uysim/doorkeeper,dk1234567/doorkeeper,ngpestelos/doorkeeper,CloudTags/doorkeeper,EasterAndJay/doorkeeper,ukasiu/doorkeeper,pmdeazeta/doorkeeper,moneytree/doorkeeper,outstand/doorkeeper,doorkeeper-gem/doorkeeper,jasl/doorkeeper,mavenlink/doorkeeper,shivakumaarmgs/doorkeeper,ifeelgoods/doorkeeper,calfzhou/doorkeeper,Tout/doorkeeper,lalithr95/doorkeeper,shivakumaarmgs/doorkeeper,ezilocchi/doorkeeper,coinbase/modified-doorkeeper,stefania11/doorkeeper