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
added tentative_mesh, but have problem
remove .user file
before try to use another point_sample.h
finished implementing poisson-disk sampling, though it still have errors some times.
Merge branch 'master' of https://github.com/sunwaylive/Point-Cloud

Conflicts:
	Point Cloud/Algorithm/NBV.cpp
	Point Cloud/Algorithm/NBV.h
	Point Cloud/GLArea.cpp
	Point Cloud/ParameterMgr.cpp
	Point Cloud/Point Cloud.vcxproj.user
	Point Cloud/UI/camera_para.ui
	Point Cloud/UI/dlg_camera_para.cpp
	Point Cloud/UI/dlg_camera_para.h