Added logo to the service provider model and logo upload in views
Allow service provider to remove logo
Added helper class to display the service providers logo (only if one has been uploaded)
cleaned up interface to logo upload - copied stylings for annotations
Added service provider logo to detailed service listing
Check the user has permission to delete/add service provider logo

Must be either 'mine' or 'logged in and either a curator or admin'
Fixed bug with service provider logo in production mode.

Need to include the filename of the logo in the path & url or the assets pipeline will serve an old version of a logo after the logo is replaced.
flash notices for uploading images
Make clicking service provider image link to the full res image
Made service provider logo a bit bigger in the service show page
Refactored so each display of the providers logo uses the helper method. Made the helper method display with max-width: 100%
gitignore uploaded provider logos
Handle missing image files
Separate provider logo's added in development and in production