Devoncarew cancel deploy

Allow the deploy dialog to be cancelled:

- add a new polymer component to display progress in-line (w/ an optional text message, and optional cancel button, and a bootstrap barber pole)
- add cancellability to the jobs ProgressMonitor class
- partially decouple a dialog completing or cancelling, from hiding the dialog. We want to be able to show progress inline in the dialog after the user has hit ok.

![screen shot 2014-05-20 at 2 24 04 pm](https://cloud.githubusercontent.com/assets/1269969/3033528/899a4bc4-e065-11e3-8ba4-c8b7c30ad8ae.png)

@ussuri