Various changes in vglClImage and vglContext to support full OpenGl-OpenCL interoperability
Trying to fix OpenGL invalid operator error and optimize vglClDownload()
CMake for OpenCL/Windows part
Setting OpenCL and CUDA option for Linux in CMAKE
Added Benchmark force CPU->GPU and GPU->CPU
Created branch branch3d
Added vglCreateImage based on 3d medical images

Needs testing!
Fixed vglCreateImage for tex3d and created vglSaveImage for tex3d

All should work alright!
demo in order to test tex3d
adding support to 3d images in GLSL
Created first CL kernel for 3d images
OpenCL working for 3d tex without OpenGL interoperability!
Removing bad images included on commit
removing output result of execution badly included
3dconv
Created many default 3d kernel operation for image 3d, also, added support in source file for many of then
added all wrappers, fixed some issues, added gitignore to ignore output folder so I dont need to worry about commiting wrong image files
Benchmark along with new wrappers
CImg benchmark demo
corrected bugs caused by incorrect ndim