Update changelog for 1.4.4 release
Update changelog for 1.4.4 release

leifcr/emberfire,FirebaseExtended/emberfire,FirebaseExtended/emberfire,IsaiahJTurner/emberfire,FirebaseExtended/emberfire,leifcr/emberfire,FirebaseExtended/emberfire,IsaiahJTurner/emberfire,rtablada/emberfire,MattMSumner/emberfire,rtablada/emberfire,MattMSumner/emberfire