* Move plugin installation method to plugin helper
* Add hook to for note addition on install error to JP/WCS note
* Add install scheduler
* Add async request parameter
* Fix up scheduled action errors
* Add route to get installation status
* Add activation endpoints and helper async methods
* Fix errors in plugin activation
* Make job ID null by default
* Add async plugin tests
* Fix install activation error errant method
* Return error codes from API
* Us AS to retrieve jobs instead of transients
* Get plugin status data from AS actions
* Use job ID instead of action ID for scheduling activation
* Add generic activation and installation status endpoints
* Add changelog entry