Create a controller for the database

[erictchin]

We should have an API that interacts with the database. We'll need certain functionality:

• Add group to the database
• Add user(s) as administrator to group
• Modify user(s) who administer a group
• Remove user(s) who administer a group
• Remove group

[erictchin]

Do we need do other things with the database?

[erictchin]

#2 has a good discussion on the schema of the database.