Update copyrights

This patch updates the copyright notifications in the headers of files.
The following patches added by Midokura should use the same copyright
statement as follow:

  Copyright (C) 2014 Midokura SARL.

Signed-off-by: Taku Fukushima <tfukushima@midokura.com>
Make it compatible with upstream Neutron

Juno branch of the upstream Neutron code has changed that
requires changes to the way RPC is set up.

Signed-off-by: Ryu Ishimoto <ryu@midokura.com>
Merge pull request #10 from midokura/upstream_compat

Make it compatible with upstream Neutron
Merge pull request #7 from tfukushima/copyright-fix

Update copyrights
Add a decorator for extensions

This patch adds a decorator that automatically generates the extension
methods required as a Neutron extension for the initial step of the
MidoNet API migration.

Signed-off-by: Taku Fukushima <tfukushima@midokura.com>
Add skeleton of a decorator for API handler mixins

This patch adds a decorator function that generates required methods for
API handler mixins based on the given list of strings represent required
handlers.

Signed-off-by: Taku Fukushima <tfukushima@midokura.com>
Add Tunnel Zone resource to the extension

This patch adds the tunnel zone resource extension and the API handler
mixin to our plugin.

Signed-off-by: Taku Fukushima <tfukushima@midokura.com>