introducing a tutorial for the retina model
adding retina tutorial
updated tutorial, need spell check, validation, nicer images and a discussion on parameters
updated tutorial, rapid spell check, retina parameters discussion added
added retina code tutorial
updated first image sample
minor update
minor updates for doc redirections and tutorial images size
Added v4l2 support for getting capture property CV_CAP_PROP_POS_MSEC
make the sparse method give correct results on CPU ocl
Add CL_CPU to supportsFeature check
simplify the logic of pyrlk
fix hog on some CPU device running ocl
fix some mismatch on cpu device running OCL
move the "cpu device checking" from supportsFeatures() to queryDeviceInfo()
Fix the problem of device selection on hybrid video systems.
Catch exceptions when large allocations fail
remove the C3 kernels in arithm, as the oclMat will never store 3 channels data
Fix bug #2590

replaced wrong check to correct check
merge add and sub into one set of kernels
Merge pull request #780 from sivapvarma:2.4
Fix bitness detection for target platform