Add NodeJS/mongo to view/add/remove teams

[coreysnyder04]

We'll need to create a new schema for teams to point to a 'teams' collection

• Team Name
• Player 1 - ID of user record
• Player 2 - ID of user record

We need to create a few new routes:
TEAMS:

• /teams - POST - Add a team
• /teams - GET - retrieve the JSON for all teams
• /teams/:teamID - DELETE - remove the team by ID
• /teams/:teamID - GET - get the team by ID
  MATCHES:
• /matches/team - POST - Add a match including two teams

Write unit tests to test this logic. Don't start UI, that will be done in a different issue.