added placeholder images in images directory (references from views submodule should be adjusted)
Merge pull request #30 from chrisflink/new-images

Thank you for the wonderful images (need bucket).
Improved Still handling.

New uses or imagecache on backend if the chosen image-style exists, or
otherwise the frontend imagecache. It needs the flag 'include still
info' in the asset search view, otherwise a fallback to the old
inefficient stills (extra restcalls) is used.
Uses new images now.
merged.