ocl: added SVM perf test
fixed two warnings in gpu sources (-Wshadow, -Wno-sign-promo)
fixed doc/tutorials/introduction/android_binary_package/dev_with_OCV_on_Android.rst
fixed doc/tutorials/imgproc/histograms/template_matching/template_matching.rst
Replaced Gittip button
typo
fix bug #3552:

replace std::swap with own code
Merge pull request #2344 from kirill-kornyakov:replace-gittip-button
Merge pull request #2349 from jet47:fix-bug-3552
Merge pull request #2348 from ilya-lavrenov:typo
Merge pull request #2342 from yashdv:android_doc_fix
Update cap_ios_abstract_camera.mm

AVCaptureVideoPreviewLayer setOrientation is depricated. This fixes the warning and provides backward compatibility.
Merge pull request #2343 from yashdv:template_matching_doc_fix
Merge pull request #2339 from jet47:gpu-warnings
Fixed compilation with IPP on Linux. Added linking with Intel compiler runtime libraries.
Added more colorizing options to XLS generating script
removed tabs
fixed year in copyright
fixed incorrect code in introduction tutorial
removed unused field