improvement to scanner class:
 - made detectLaser method accept pre-existing images (laser/noLaser)
to reduce the amount of picture snaping
 - modified calibration method to include detectLaser : calibration
with 3D point extraction now works as intended
 - modified loadScan method to switch loading method based on input file
type (ply loading not yet implemented though)
- cleaned up configuration file
- started modifying all the various classes to fetch their original
setting from the configuration file directly