Port over the old credit pages.
Add links to the credits pages.
Fix a couple links.
Rearrange override content: most to root, credits to /credits.
Typo. Previous commit fixed #612.
Remove unnecessary target attributes
MPOTs home page.
Interview lists. Fixes #614.
Remove dead link when there is an alternative.
I went overboard with a search and replace in an earlier commit. Drew caught this.
Merge pull request #622 from afred/credits-610

All kinds of override content