Services and other updates:
- Added s3 upload service.
- Stubbed in remaining services for creating link and link delivery.
- Added remaining accessor methods to PhotoboothSession and wired up setting data there through the service flow.
- Refactored some existing service names and event names to make the app flow more clear.
- Updated capture script to store capture sequence settings in vars.
- Added renaming, resize and compression of the photos in the capture hook script.