OpenGl_ShaderManager::pointSpriteAlphaSrc() now does not return alpha from Red channel
for RGBA marker texture in Core profile.
OpenGl_ShaderManager::prepareStdProgramFlat() - restored code for drawing points without texture.
Built-in GLSL programs now flip .y in shaders instead of
relying on GL_POINT_SPRITE_COORD_ORIGIN unavailable on OpenGL ES.
Added sample markers.tcl (moved from test cases).
Sample now includes marker_kr.png for testing marker orientation.
Support of old persistence (CSFDB format) is removed from OCCT samples (C#, MFC and Qt)
Motor model from data/csfdb is converted from CSFDB to BRep format and put to data/occ (Motor-c.brep)
Make commands syntax to meet coding rules.
Correct angle dimension initialization to allow ellipse input geometry with equal radii.
Change default value of arrow angle for dimensions (from 20 to 12 degrees).
Add arlength, arangle, textmode, textsize to vdimension and vdimparam Draw commands.
Add color parameter to vdimension and vdimparam.
Display dimensions by default.
Add dimensions demo script samples/tcl/dimensions.tcl.
Add file for test case for issue CR25235
Add pre-rendered images for custom markers.
OpenGl_Window - drop overcomplicated find_pixel_format() function
OpenGl_Caps - add option to force software OpenGL imlementation (MS or Apple)
Remove TODO from test case
Add grayscale custom marker to the test
Correct color bitness in attributes list
Tcl samples moved from src/DrawResources to samples/tcl.
Scripts VisualisationDemo.tcl and ModelingDemo.tcl fixed to work on Windows.
File wing.brep moved from src/DrawResources to data/occ, and DataExchangeDemo.tcl corrected.
OCAFDemo.tcl removed, as it has little sense and referred data files are lost
Added sample Tcl script creating a model defined on the 'Open CASCADE challenge' web page
