WIP: Implementing create container workflow

Wondering how to set the container type select element to 'lxc' as part of the test. See `test_machine_view_panel.js`, line 389, https://github.com/juju/juju-gui/pull/393/files#diff-083887946d0a35f6814ae62499ba4829R389 - the value of this select is passed as data in the `createMachine` event that gets fired at https://github.com/juju/juju-gui/pull/393/files#diff-da19dde1a956e91d68a94d9aecf29368R80
Doing all of this will allow you to simulate a change event on the node using `selectNode.simulate('change', ...options...);` http://yuilibrary.com/yui/docs/api/classes/Node.html#method_simulate