introduce theming model
add some translations
configure theming abilities
wire up account and theming
add page to edit theming in admin backend
add account theme association
move cname from account to theming
refactor managing theming in admin backend
create new defalt theming on account creation
Merge pull request #24 from schoetty/master

fixes #21: depend on resque-scheduler ~> 2.5.5 and fix configuration for...
fixes #21: depend on resque-scheduler ~> 2.5.5 and fix configuration for pageflow:install generator
remove theming management from admin
add entry stylesheets to editor
add foreign key to user <-> revisions association
fixes media loading spinner position
fixes shortly broken thumbnail in backend view
Merge pull request #26 from upsworld/master

small fixes for media loading spinner and broken backend thumbnail
improve migrations to move existing data
Merge pull request #25 from schoetty/theming

Theme/Theming refactoring