Keystone Authentication

* Inserted Keystone middleware into Paste Deploy pipeline when
  running an HTTP transport instance.

Change-Id: I8d206747878b1013f668f116fdfc1d76204aef1c
Message support in SQlite.

Known Defects: list() does not throw when there is no such queue

Implements: blueprint message-pagination

Change-Id: Iadb1ef348a53e0de28c6b45782ef686a3f1bf1e2
Message support in WSGI.

Implements: blueprint transport-wsgi

Change-Id: I8c3908ce7e74da26b3ebebd06f308754665d681b