Introduce paperclip gem.
Change gem paperclip to fix it.
Change old field logo with string type  by new attachment type.
Added attached file logo to garage.
Added validate attachment content type to png or jpg.
Added paperclip support to view garage show.
Fixed error with default image.
Delete garage image funtionality.
Merge pull request #14 from Norauto/garage_avatar_manage

Garage avatar manage