Facia cards 2.0

First container under new container regime:

1. `fc-` prefix keeps new code separate from incumbent containers. adds temporary bloat but means the old stuff can be safely retired at a later date
2. presentation logic has been moved from templates/css into new slice scala modelling 

todo:
- remove old `standard`/`list` templates into single `item` template
- large media list (50% image width)
The position from the top was offset before (it worked out to be 3px padding on the top). This matches it up with the other comment count icons.