Updates for project and fellow pages

- PIF projects and fellows are now both data we can pull in any part of the
  site and expose with a JSON endpoint.
- Project rounds can be generated by adding the content to the
  projects.yaml file, creating an html template and including the
`list.html` file in the `pages/pif/projects` directory.
- Also removes an unused key from the team.yml file

Still needed: 
- pictures for each PIF (available, just need to integrate with this project)
- descriptions for many past projects (probably available on wh.gov)