Manage code changes

[oubiwann]

Update Watcher component to:

• [ ] Perform "ubercompile" and check for errors
• [ ] Upon ubercompile error
  • [ ] Update state of service: :code-change? true, :successful-recompile? false
  • [ ] Log an error message
  • [ ] Publish message :topic :unsuccessful-recompile :message {... :service-key service-key}
  • [ ] Go no further in the code change management process
• [ ] Upon successful recompile
  • [ ] Log success message to debug
  • [ ] Update state :code-change? true, :successful-recompile? true
  • [ ] Publish message :topic :successful-recompile :message {... :service-key service-key}