Added validation for TOS agreement

Tests are currently broken, will fix later

app/models/user.rb

@@ -13,13 +13,17 @@ class User < ActiveRecord::Base
 
   # Setup accessible (or protected) attributes for your model
   attr_accessible :username, :email, :password, :password_confirmation,
-    :remember_me, :login
+    :remember_me, :login, :tos_agreement
   # attr_accessible :title, :body
 
   # Virtual attribute for authenticating by either username or email
   # This is in addition to a real persisted field like 'username'
   attr_accessor :login
 
+  # Requires acceptance of the Terms of Service
+  validates_acceptance_of :tos_agreement, :allow_nil => false,
+    :accept => true
+
   # allow login via either username or email address
   def self.find_first_by_auth_conditions(warden_conditions)
     conditions = warden_conditions.dup