[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/main/__init__.py

@@ -3,7 +3,24 @@ from flask import Blueprint
 main = Blueprint('main', __name__)
 
 from app.main.views import (
-    index, sign_in, sign_out, register, two_factor, verify, send, add_service,
-    code_not_received, jobs, dashboard, templates, service_settings, forgot_password,
-    new_password, styleguide, user_profile, choose_service, api_keys, manage_users
+    index,
+    sign_in,
+    sign_out,
+    register,
+    two_factor,
+    verify,
+    send,
+    add_service,
+    code_not_received,
+    jobs, dashboard,
+    templates,
+    service_settings,
+    forgot_password,
+    new_password,
+    styleguide,
+    user_profile,
+    choose_service,
+    api_keys,
+    manage_users,
+    invites
 )