2.83
more example browser tweaks, mostly related to (debug) rendering
enable URDF loading throught the 'File/Open' menu set a default camera targets for each demo. note that it is only reset when switching to a different demo, so you can restart at your chosen location. no OpenCL pairbench drawing in OpenGL2 (there is no VBO available etc)
cmake with 2 examples (HelloWorld, BasicDemo)
fix another compile issue
add initial examples, replacing the 'Demos/Demos3'. Will make it work cross-platform, OpenGL3/OpenGL2 and add more examples to it.