* Extending template_matching tutorial with Java

* adding mask to java version of the tutorial

* adding the python toggle and code

* updating table of content

* adding py and java to table of content

* adding mask to python

* going back to markdown with duplicated text

* non duplicated text

Fix OpenCL's wrong output of calcOpticalFlowPyrLK function's output vector of err. Improve err's precison of the calcOpticalFlowPyrLK OpenCL function and add the relative test.

Issue 8647: Updated doc for cv::matchTemplate to reflect current support for methods when mast template is supplied.

Added default parameters for minDisparity, numDisparities and blockSize. This fixes a bug where SGBM::load would not compile.

Spell correction

Corrected the spelling which was used in explanation for parameters.