Implement decimate /subdivision
Add Smooth Operation
Change implementation of Merge operation

Iso surface using marchingCubes instead of contour
Minor change

Change decimate using SimplificationOp
Change display volume as write color
Change init image data right size
Display class add option

Add transparent support
Directly output current window
Test class change , not so important
Permission change

download and editing panel remove login required
Merge branch 'DavidNg_Local'