Move utility functions to utils.py and make tests pass.
Fix bug 1047002: Do not generate token in subscribe view.

Includes rewritten tests for the view and utility function.
Merge pull request #107 from Osmose/async-subscribe

Fix bug 1047002: Async subscribe
Fix bug 1066704: Notify stewards when an interest request is received.
Merge pull request #113 from Osmose/steward-emails

Fix bug 1066704: Notify stewards when an interest request is received.
Bug 1053507: Add GET_INVOLVED flag handling per new comment in bug.