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}