Renamed bare metal to root container.
Merge pull request #432 from huwshimi/bare-metal-rename

Renamed bare metal to root container

As per the request from UX the bare metal container has been renamed to root container.
Scaleup UI polish.
Display constraints correctly in summary panel.
Merge pull request #436 from huwshimi/scaleup-polish

Scaleup UI polish

This branch fixes the scale up button colour and sets the unit count from the model.
Merge pull request #433 from huwshimi/fix-blank-constraints-message

Display constraints correctly in summary panel

If the constraints are set to null then we should display the correct message. See: https://bugs.launchpad.net/juju-gui/+bug/1339782