Summary:
- Remove "Diffusion" crumb (redundant with application icon)
- Put "All Repositories" in its place on the landing page.
- Render the repository crumb as "rX" instead of "X Repository".
Test Plan: Looked at various Diffusion pages.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D4173
051276a96b