Fixed graphic structure recompute after closing view.
Removed collector and all corresponding logic and methods from AIS_InteractiveContext.
Method AIS_InteractiveContext::Erase() now hide object from viewer without deleting resources.
Erased objects now properly recomputed after closing view.
Samples update
Removed useless method AIS_InteractiveContext::EraseMode()
Documentation update
Warnings fix
Regressions fix
Introduce Point Sprites usage.
Graphic3d_Group - drop Marker(),MarkerSet() methods - markers should be drawn using AddPrimitiveArray.
Added new Draw Harness commands vcaps, vmarkerstest.
WNT_Window::Dump method calls were replaced with V3dView::Dump calls
Type casts were removed
Added supported image formats in file filters of Export methods, edited documentation for Image_AlienPixMap class
Supported image formats filter for 2dsample was extended
