Removes recently departed team members
Makes them "alums" instead of removing

- This is important if we want to continue attributing blog posts to them.
Add Mike Bland (mbland) to the front page
Added PIF content
Rename, re-organize pif pages
Adds PIFs to the data file

- Each pif is hidden from the team display, tagged with pif: round-n, where
  n is their round
Merge branch 'gboone-pif' of github.com:18F/18f.gsa.gov into gboone-pif