updated comments and new retina interface use
Fixs: After scaling back to original image, some detected ROI will outside the original image ROI
Merge pull request #827 from apavlenko:fix_android_tutorial1
Merge pull request #800 from asmorkalov:android_cam_idx_semantic
NullPointerException in case of error on opening native camera fixed.
minor chnges for conflict removal
resolved conflicts, updated retina class interface and optimized a heavy retinacolor process
Fix for spurious assert in cv::compareHist

When comparing histograms that look like multi-channel images (e.g a 3D histogram, of 4x4x4 bins, might appear as a CV_32FC4 matrix), cv::compareHist would complain because it was expecting the matrix type() == CV_32F. Now we test matrix depth() == CV_32F instead.
updated doc
fixing precommit build on ubuntu-64 (now it takes OCL headers from non-default OCL SDK, but libs from default one)
Merge pull request #858 from apavlenko:fix_ocl_build_on_bb
corrections required for portability. To be validated by buildbot
updated doc and interface code to solve compile warnings and errors
minor error correction
Merge pull request #854 from asmorkalov:android_null_invalid_cam
updated/corrected documentation
updated sources to correct buildbot warnings
updated doc+minor typo/buildbot reports correction
Added setting feature of FPS in cap_libv4l
trying to solve valarray pointer access problem, enhancing documentation