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)