Created local charm new or upgrade inspector.
Refactored local charm upload helpers to support multiple service upgrades
Merge pull request #150 from hatched/upgrade-new-inspector

__To QA__
- Deploy a local charm to sandbox
- Navigate around the inspector, opening closing, viewing charm details etc (exploratory)
- Drag and drop the same local charm zip
- You should get an inspector that has the Request Series view on top and the new Upgrade Services view on the bottom.

__Notes__
Part 3 will hook up the upgrade. It needed the fakebackend fix to land first.