Fix Test Case: in latest version, window.cv is a promise instance that makes most test case failed.

* Fix Browser Test Case: In latest version, window.cv is a promise instance

In latest version of opencv.js, window.cv is promise instance.
So that most of the test cases is run failed.
This commit is to fix browser test case.

* Add comment for backward compatible

Add comments for backward compatible

fixed fillPoly, the overloaded variant with InputArrayOfArrays parameter (single or multiple polygons)

* Fix window title of python segmentation example

* Fix float text position of python segmentation examples

* Added ClipByValue subgraph

* Return const nodes

* Fix integer overflow in parseOption().

Previous code does not work for values like 100000MB.

* Fix warning during 32-bit build on inactive code path.

* fix build without C++11

Fixed NMSBoxes bug

* Added NMS for each class

* Updated cpp sample

* Fixed errors

* Refactoring

* Added NMS for IE

* fix documentation for cv::blur

* correct the position of ksize parameter

* add eigen tensor conversion functions

* add eigen tensor conversion tests

* add support for column major order

* update eigen tensor tests

* fix coding style and add conditional compilation

* fix conditional compilation checks

* remove whitespace

* rearrange functions for easier reading

* reformat function documentation and add tensormap unit test

* cleanup documentation of unit test

* remove condition duplication

* check Eigen major version, not minor version

* restrict to Eigen v3.3.0+

* add documentation note and add type checking to cv2eigen_tensormap()