#177473 by chx, quicksketch, dvessel and merlinofchaos: make it possible for modules to add their own theme variable preprocess hooks and improve documentation on the different preprocess options
#177473 by chx, quicksketch, dvessel and merlinofchaos: make it possible for modules to add their own theme variable preprocess hooks and improve documentation on the different preprocess options

lincgr/Prueba,brainhell/drupalglass,OccupyWallStreet/streetnet,edutrul/social-web,brainhell/drupalglass,rmcveigh/frontend-dev,joshkoenig/golden-god-demo,brainhell/drupalglass,edutrul/social-web,edutrul/social-web,edutrul/social-web,brainhell/drupalglass,joshkoenig/golden-god-demo,rmcveigh/frontend-dev,lincgr/Prueba,edutrul/social-web,brainhell/drupalglass,joshkoenig/golden-god-demo,OccupyWallStreet/streetnet,lincgr/Prueba,OccupyWallStreet/streetnet,OccupyWallStreet/streetnet,joshkoenig/golden-god-demo,lincgr/Prueba,joshkoenig/golden-god-demo,joshkoenig/golden-god-demo,joshkoenig/golden-god-demo,rmcveigh/frontend-dev