Add opencl implementation of Farnback optical flow.
Fix build errors
Fix white-spacing
Temporarily disable command queue release as it causes program hang at exit
Fix ocl::setBinaryDiskCache
Previously the function requires Info::Impl implicitly. A call will create
new Context this function which is not intended.
The properties are now moved to global scope to fix this issue.
Renew function logic.
Move function definition from header to cpp.
some accuracy fix of HOG
format the ocl's samples name
more fix to HOG
some tweaks to samples
warnings fix
stereoBM fix an error on Linux when running full performance test
adding 'ios.h' to ignore list should work on non-Mac)
Merge pull request #1069 from apavlenko:fix_bin_compat_checker
Merge pull request #1055 from pengx17:2.4_ocl_hang_workaround
Merge pull request #1060 from pengx17:2.4_setbinary_fix
Merge pull request #1061 from bitwangyaoyao:2.4_fix2
Merge pull request #1051 from pengx17:2.4_fback_ocl
JavaCameraView delivers same frame twice (Bug #3123) fixed.