Change signature of the importReconstruction function to allow for
correct python bindings to be exported.

  * use SOLVE_EPNP for the initial guess

original commit: https://github.com/opencv/opencv/commit/c6de84d868302c7a55852d86aab337a787030e07

* Add tracking-by_matching code and sample

* Make interface for PedestrianTracker

* Replace PedestrianTracker -> TrackerByMatching

* Make proper filtering by class id in tracking_by_matching

Also make the sample build in the case when opencv_dnn module is not
built.
Also help is added.

* Remove TODO-s from tracking_by_matching code

* Add parameter frame_step, add copyrights, fix warnings

* Remove copyright from tracking_by_matching

* Rename check macros and remove obsolete mentions of pedestrians

* Tune default thresholds in tracking_by_matching sample

* Add description of classes and factories

* Remove unrequired EOL-s at the end of files

* Replace pointers by references for output parameters

* Fix some warnings found by buildbot

* Fix warning from buildbot, tune some thresholds in tracking_by_matching

* Replace pragma once by ifndef-define clause

* Fix more Windows warnings

* Change case of methods of TrackerByMatching class

* Change name of methods to CamelCase in TrackerByMatching

* Make more convenient check macros in tracking_by_matching.cpp

* Simplify tracking_by_matching sample

* Fix Mac error in tracking_by_matching

ovis: fix build on windows platform (type conversion)

ovis: add methods (+sample) to play/stop animations

ovis: add entity property and according function override

ovis: fix overloaded method wrap aliases

ovis, samples: add animation to ovis demo

ovis: consolidate setting entity property

add python sample

* issue-2060: implement ability to return scores for edgeboxes implementation

* issue-2060: address feedback to add some foolproofing

ovis, aruco_ar_demo, remove trailing whitespace

Add missing codecs to cudacodec which uses Nvidia Video Codec SDK including checks to ensure codec used in input video file is supported on the current device.
Re-enable cudacodec performance test.

* doc: fix return parameter for void method

* docs: add missing parameter description

KinectFusion: several updates (#2133)

* truncateThreshold added

* demo updated for RealSense

* first Kinect2, then RealSense

* more distance-based parameters