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