Read flags from 'cache' instead of resetting them

OpenCLAllocator::copy() may call upload()/download() methods

* Add a new interface for hough transform

* Fixed warning code

* Fix HoughLinesUsingSetOfPoints based on HoughLinesStandard

* Delete memset

* Rename HoughLinesUsingSetOfPoints and add common function

* Fix test error

* Change static function name

* Change using CV_Assert instead of if-block and add integer test case

* I solve the conflict and delete 'std :: tr1' and changed it to use 'tuple'

* I deleted std::tr1::get and changed int to use 'get'

* Fixed sample code

* revert test_main.cpp

* Delete sample code in comment and add snippets

* Change file name

* Delete static function

* Fixed build error

Found via `codespell -q 3 --skip="./3rdparty" -I ../opencv-whitelist.txt`

Found via `codespell -q 3 --skip="./3rdparty" -I ../opencv-whitelist.txt`

Found via `codespell -i 3 -w --skip="./3rdparty" -I ../opencv-whitelist.txt`

Most part is deprecated since C++11

remove 'dont_wait' (can be replaced with has_wake_signal)

Signed-off-by: Li Peng <peng.li@intel.com>

Signed-off-by: Li Peng <peng.li@intel.com>

* Extracted base64 persistence functionality

* Extracted YML persistence functionality

* Extracted JSON persistence functionality

* Extracted XML persistence functionality

* Extracted public C and C++ interfaces implementation in persistence

* Persistence: cleanup and fixes

* fixup! Persistence: cleanup and fixes

* Intel Inference Engine deep learning backend.

* OpenFace network using Inference Engine backend