- improved calibration/settings managment:
 * added on screen controls for laser line extraction
parameters (threshold, erosion etc)
 * cleaned up and restructured ui for calibration
 * improved server side : made re-fetching laserOn/laserOff
images optional, so all post processing can be done on
copies of the first two captures
 * added necessary "plumbing" (socket io etc)

- fixed missing node.js dependencies
- updated bower/client side dependencies
- various minor experiments (nw etc)