Issue #76 - In Progress

Adds the requisite classes for retrieving users from a database, namely creating a UserModel and a Get controller and request observer.  There are tests instituted for the Model, but I am unsure how to test the controller or request observer.

The next step is to actually institute this into the planning poker code so it actually builds the mailer from an array of users.  I still have to add a method to Mailer.java that does that.

Signed-off-by: Alec Thompson