Made Geary.Engine a namespace
Made Geary.Engine a namespace

There's no need for Geary.Engine to be a class; it is nothing but
consts and static methods.

orlandosanchez/geary,emersion/geary,githubnemo/geary,githubnemo/geary,abn/geary,tshikaboom/geary,kyoushuu/geary,jimbonator/geary,mjog/geary,tshikaboom/geary,dominickm/Geary,kyoushuu/geary,orlandosanchez/geary,emersion/geary,glebihan/geary,jimbonator/geary,martinra/geary,kpiwko/geary,aatishnn/geary,tshikaboom/geary,robol/geary,AtticHacker/geary,mpdeimos/geary,rschroll/geary,glebihan/geary,jimbonator/geary,dominickm/Geary,AtticHacker/geary,martinra/geary,martinra/geary,orlandosanchez/geary,glebihan/geary,mjog/geary,geekvigilante/geary,emersion/geary,didrocks/geary,mjog/geary,robol/geary,aatishnn/geary,githubnemo/geary,AtticHacker/geary,MohamedIM/geary-unofficial,aatishnn/geary,rschroll/geary,robol/geary