OverHaul of Sky

[freeformflow]

The latest new hotness for Sky:

• [x] refactored CloudFormation configuration assembly
  • [x] Resources are organized into tiers based on if their replacement can be avoided during updates.
• [x] stabilize update, now builds developer code before pushing
• [x] Protect against environments that don’t exist
• [x] Create sky domain command to isolate CloudFront management.
  • [x] Publish
  • [x] Delete
  • [x] Invalidate