Style instance detail page

1. Styled Instance Details page to look like the mockup from Monica.  All buttons work (except for the "Edit Instance Info" link). I also refactored a bunch of internals so that all the Instance modals follow the new Flux architecture, and route through the proper channels that allow them to look like Bootstrap modals with a nice animation.

2. When the user terminates an instance (which currently they can only do from the instance details page) it redirects them to the instance list page, and the instance is correctly removed from the list.  If the termination fails for any reason, the instance will be added back to the list automatically.

3. Currently hiding Resize and Restart until their use (and API calls) are clear.  Right now I'm pretty fuzzy on how to use them.