Add layer forward interface with InputArrayOfArrays and
OutputArrayOfArrays parameters, it allows UMat buffer to be
processed and transferred in the layers.
Signed-off-by: Li Peng <peng.li@intel.com>

* Improve Documentation
Fixes Spelling Mistakes.

Fix sample code in js_tutorials

git: .gitignore update

ignore all "dot" files/directories by default.
'ignored' files can be added via 'git add -f' command if necessary.

Fix typo in js_tutorials

* Adding constants to json file

* adding sub-module to constants name

* adding namespace to functions

* adding namespace to classes

* remove namespace from methods

* static methods

* python signatures generation

* python: more fixes for signatures generation

Python names existence can be checked via command:

    python -c "import cv2 as cv; print(repr(<py_name>))"

IPP is used on iPhoneSimulator only.

for non-ANDROID platforms