app.scss: remove confusing, not used app.scss file.
images/show.html.haml : Horizontal button panel for CRUD operations.

This was the simplest thing to do to get the :delete action "working"

Still TODO: confirmation isn't working!  Fix that!
views/images/show.html.haml : conditional wrapper around license info.
CommonsLicense: Always Update from YAML file. (for now) TODO: CRUD?