Update view `_user` to include username and email in full.go
Update view `_user` to include username and email in full.go

SkygearIO/skygear-server,SkygearIO/skygear-server,SkygearIO/skygear-server,rickmak/skygear-server,rickmak/skygear-server,SkygearIO/skygear-server,rickmak/skygear-server