persistent sketches. first draft.
Merge branch 'master' of git://github.com/eburi/lumi-server

* 'master' of git://github.com/eburi/lumi-server:
  add the default device from MAC to config.json - fixed, again
  add the default device from MAC to config.json - fixed
  add the default device from MAC to config.json
  added phantomjs as submodule