added UI controls for rotating and flipping photos. updates #82. updates #83.
Merge branch 'edit-photos' of https://github.com/DateEdge/website into edit-photos
merges master
adds photo manipulation through virtual attr
adds rotate functionality
changes disable with back to data attr
makes photo flipping and flopping with js
changes rotate back to destructive version
changes carrierwave to use asset host url
makes preview image scroll when in overflow, finishes #82 & #83