Update dev docs to include notification-agent

I was reading through the developer docs and noticed they had not been
updated for the new ceilometer-agent-notification service. This patch
adds the right command to put into the localrc. The command comes
straight out of devstack/lib/ceilometer.

Change-Id: I23b917b1c48b6474de2b29901fa039d8353f0eb0
Remove unused db engine variable in api

This patch removes the unused db engine variable passed in each request
in the API

Change-Id: I8e939b6f37ec3021b05c99e8b889ec16dfc6af2b
Use swift master

Swift is not available on PyPI, so use the tarball from master instead.

Change-Id: I1721804890423c242bb69697d2c42ca57d0871a4
Merge "Remove unused db engine variable in api"
Merge "Update dev docs to include notification-agent"
Fix measurement docs to correctly represent Existance meters

There are various meters in the measurement docs that
wrongly note the meter as Duration instead of its
existance. The meters fixed include network, port,
router, subnet, floating ip, volume.

fixes bug #1252988

Change-Id: I45a84769d6ee46d53e580ae08cbbf32ed20562b1
Fix docs on what an instance meter represents

instance meter is a gauge which meters an instance
itself. The current description of duration of
instance is misleading.

fixes bug #1266313

Change-Id: I902606928fc59f5663d638d05f237fe3e5e1175d
Merge "Use swift master"
Fix the py27 failure because of "ephemeral_key_uuid" error

Change-Id: Ic520a1657106a10a595240f84455eec1b79c2de0
Refactored session access

Encapsulated all access to sqlalchemy.get_session
This is needed for further refactoring of session handling

Change-Id: I35c64b69c7bde80713ca1f0e7f7f83bd57493668
Merge "Refactored session access"
Merge "Fix docs on what an instance meter represents"
Merge "Fix measurement docs to correctly represent Existance meters"