added logo image to publisher object
added publisher logos to media folder
added set_logo and set_images methods on publisher
added black and white logo to publisher object
added splash image to publisher object, added setter methods for b&w logo and splash image, updated set_images class function to include all these changes.
changed wording on logo setters
added thumbnail creation to publisher image setter methods
Publishers now have links to their logos in their json representations
added Publisher.set_images() to deploy hook
moved logos to top - color logos have negative space filled in with white
Revert "moved logos to top - color logos have negative space filled in with white"

This reverts commit e8a872d595435f5dfa0bff050a1996ef0ca80363.
Revert "added Publisher.set_images() to deploy hook"

This reverts commit 786f71947c4fd7dea40e9a1acf2f46e6c2a2e7e8.
new images - replace old ones.
added colors to publisher model
added colors to json
publishers now have logo / splash image support.
associated colors for publisher can also be added to models

Merge branch 'feature/pubimages' into develop