[WIP] Start of user accepting invite.

This commit only deals with acceptance by
users who are already in system.

Changed invite client to return invited user objects
instead of dictionaries.

Added commented out test. fixed up fixtures to return invited user
object for invites

app/notify_client/models.py

@@ -110,3 +110,18 @@ class User(UserMixin):
 
     def set_password(self, pwd):
         self._password = pwd
+
+
+class InvitedUser(object):
+
+    def __init__(self, id, service, from_user, email_address, permissions, status, created_at):
+        self.id = id
+        self.service = str(service)
+        self.from_user = from_user
+        self.email_address = email_address
+        self.permissions = permissions.split(',')
+        self.status = status
+        self.created_at = created_at
+
+    def has_permissions(self, permission):
+        return permission in self.permissions