Add teams to group users.
Require authentication to view teams.
List user's teams on their profile page.
Merge pull request #96 from atsheehan/view_teams

View teams
Unpacking submissions is idempotent.

Re-running the unpacker will not create duplicate source files
per submission.
Merge pull request #97 from atsheehan/idempotent_extractor

Unpacking submissions is idempotent.
Admins can mark submissions as featured.

Featured submissions can be used to highlight solutions for
a particular challenge. An admin can select which submission
is a good example of how to solve a challenge and mark it as
"featured".
Prevent non-admins from featuring submissions.
Add foundation icons.

Will be used to indicate if a submission is featured or not.
Show featured submissions first.
Merge pull request #98 from atsheehan/featured_submissions

Featured submissions
Use correct URL for fonts.

When the font assets are compiled in production the URL needs to
be appended with the random string to the filename to find the
file. The font-url method in SCSS will handle this.