Fixes #10. This will result in a user's friend names being stored only once instead of having 'Rob', 'Rob', 'Rob', etc. in every match_friends row.
Also changes user interface for specifying who you grouped with. It felt too slow to type out user names when it already knew them to autocomplete them. The new interface shows checkboxes for past friends you've grouped with:
Fixes #10. This will result in a user's friend names being stored only once instead of having 'Rob', 'Rob', 'Rob', etc. in every match_friends row.
Also changes user interface for specifying who you grouped with. It felt too slow to type out user names when it already knew them to autocomplete them. The new interface shows checkboxes for past friends you've grouped with: