Add Java and Python code for Image Segmentation with Distance Transform and Watershed Algorithm tutorial. Use more Pythonic code.

Add Java and Python code for the following imgproc tutorials: Affine Transformations, Histogram Equalization, Histogram Calculation, Histogram Comparison, Back Projection.

Add Java and Python code for the following imgproc tutorials: Canny, Remap, threshold and threshold inRange. Use HSV colorspace instead of RGB for inRange threshold tutorial.

- CV_RGB() macro is moved into opencv2/imgproc.hpp from imgproc_c.h
- samples/cpp/filestorage_base64.cpp is dropped

- use per-module includes instead of "opencv.hpp"
- unused function warnings
- undefined macro warning

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

* Update samples

* Update calib3d.hpp

* Update calib3d.hpp

* Update calib3d.hpp

* Update calib3d.hpp

Original commit is a5f19f7dd6ae5bc93f73e0417a9e0bfd34c01672

Distance Transform tutorial fixes

Distance Transform fixes v.2

Distance Transform fixes v.3

Distance Transform fixes v.4

1. someMatrix.data -> someMatrix.prt()
2. someMatrix.data + someMatrix.step * lineIndex -> someMatrix.ptr( lineIndex )
3. (SomeType*) someMatrix.data -> someMatrix.ptr<SomeType>()
4. someMatrix.data -> !someMatrix.empty() ( or !someMatrix.data -> someMatrix.empty() ) in logical expressions

Conflicts:
	samples/cpp/tutorial_code/ImgTrans/HoughCircle_Demo.cpp

Also fixed some typos and code alignment
Also adapted tutorial CPP samples
Fixed some identation problems

Made all STL usages explicit to be able automatically find all usages of
particular class or function.

These codes should be included into regular builds.

Added 02 cpp sample files for tutorials: remap and Geometric Transformations (warpAffine and Rotation2D)