remove as much warnings as possible
use enum instead of MACRO for ocl.hpp
add command line parser in accuracy test and perf test
some bug fix for arthim functions

[edit: cleaned whitespace]

This fixes build without TBB and CUDA. Issue #2445

Also removed assigned only variable.

[edit: cleaned whitespace]

All errors were found by doc/check_docs2.py

The rst_parser.py was unintentionally corrupted by normalization.
This fix repairs the script and fixes Java API generation.

This reverts commit 4d36be87.

Conflicts:
	modules/ml/include/opencv2/ml/ml.hpp
	modules/ml/src/data.cpp

This reverts commit 618fbf55.

This reverts commit 4aaaef59.

Conflicts:
    modules/imgproc/include/opencv2/imgproc/types_c.h
    modules/legacy/include/opencv2/legacy/legacy.hpp