Removed cirros and network declarations

Removed extra cirros declaration and removed non-working
network setup.
Merge pull request #39 from hogepodge/bugfix

Bugfix
Correct vswitch external interface detection
Merge pull request #40 from hunner/vswitch_fix

Correct vswitch external interface detection
Added simple tool to help review changesets.
Merge pull request #41 from hogepodge/tools

Added simple tool to help review changesets.
Configure neutron core plugin for vswitch
Merge pull request #43 from hunner/core_plugin

Configure neutron core plugin for vswitch