Added pictures model and added pictures to rooms [#46061693]
Added image to form.html.erb and show.html.erm
Picture management with no Javascript. All users can view pictures. Only admin can edit/destroy
Added 'fog' gem and set carrierwave to use fog for S3 storage.
Added .DS_Store line to .gitignore
Added pictures.css.scss
Modified .gitignore to ignore the /uploads/tmp folder