Deployments page

First go at the deployments page. I'm looking to finish off this feature by tomorrow. Especially I want feedback on the `dangerouslySetInnerHTML` attribute and the ownership of the two functions: `formatCurrentActions` and `formatAffectedApps`.
This looks confusing because the current step is not yet complete. For example, try scaling an app from 1 to 10 instances. It creates a deployment with a single step. This cell will always show "1/1" for that deployment, which makes me think it's complete.

Maybe the first number should only be *completed* steps, i.e. `model.get("currentStep") - 1`. The value would never become 1/1, but that's the point: this is showing progress. If it's done, the deployment shouldn't be shown here.