A new counter MemHeapUsage was added to OSD_MemInfo class to examine program heap size
DRAW command meminfo got new option -h (--heap ) to use new counter data
The following testcases were changed to use new option -h of DRAW command meminfo
myCounters[MemHeapUsage] now will always be refilled every time the OSD_MemInfo::Update() function is called.
Fixed testcases to use meminfo -h instead of meminfo -w to detect memory leaks more properly.
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
