added three wlop confidences:
1,neighbor average
2,nearest wlop
3, 1*2
added "ISO Value Shift"
small change for better color
added Poisson-disk sampling
test
Merge branch 'master' of https://github.com/sunwaylive/Point-Cloud into quality_map

Conflicts:
	Point Cloud/Algorithm/Poisson.cpp
	Point Cloud/Point Cloud.vcxproj.user