- added cleaner "server-side" support for loading and saving
scans
 * added very basic ascii ply writing support
 * removed the redundant latestScan attrib : keeping currentScan
instead
 * some minor related code restructuring
 * added fetching latest/recent file path from the config file

- started adding 3d points extraction to calibration method
- added save/load support to the main ui
- added settability of particles size and color
- minor related cleanups
- added forced image resize to intended resolution:
 * not having the webcam fetch images in the intended resolution
can lead to really bad scans: this is now fixed