Move the data in the Documents table

Copies the data from the Documents table to the Prisms table.
Changes the colors of the buttons and logos (yellow wasn't working)
adds the highlight and visualize images for the browse page
one more color change to the logo (no more!)
updates the migrations to remove old columns
Update the migration to also grab the content field
Don't remove fields (for now)
Merge branch 'feature/migration' into develop
Merge branch 'develop' into feature/prism_browse