#10 adding live view
- system view dropped, live view created instead
- new rest service only switching on a new camera control
- camera control implemented as a runtime execution of start and stop
  commands for the camera
- new service and controller in javascript, only showing the view once
  camera on server side is OK
- added check to switch off the camera after some time if not used
- refactoring runtime executor a little and adding another execute
  method there to be used in the camera