Two commands are added in DRAW:
decho: allows switch on/off echo of commands and their results. When echo is on, all commands implemented as OCCT DRAW C procedures will be echoed to standard output, along with their result. This can be useful to trace process of execution of script evaluated by 'source' command.
dlog: implements off-screen log for recording DRAW commands and their output for further processing in Tcl script (mainly for use in automatic tests). Run this command without arguments to get help.
Added ios::sync_with_stdio() call to Draw::BasicCommands.
Correction for compilation on Linux
Added Graphic3d_GraphicDriver::MemoryInfo() function.
Added vfps command to estimate average frame rate of 3D Viewer
Simplified vdrawsphere command
Removed turnVbo and performance measurements from vdrawsphere.
Added vvbo command to control VBO usage flag.
Added vmemgpu command to display GPU memory info from graphic driver
