The TiffDecoder keeps an open file handle.
As a consequence the file cannot be removed
before the TiffDecoder closes the file.

Some TIFF images consist of only one strip. The magic value 2**32-1 for the
"rows per strip" tag reflects that fact, effectively meaning "infinite".

Conflicts:
	modules/highgui/src/grfmt_tiff.cpp
	modules/highgui/test/test_grfmt.cpp

fix whitespace

fix compile error

tiff test fixed

Jpeg2k color to greyscale conversion on non-Windows is done post decoding because system libjasper segfaults when decoding color images as greyscale.

- Imgcodecs_Image, write_imageseq - assuming JPEG images have losses
- Imgcodecs_Drawing, c_regression - replaced assert calls
- Imgcodecs_Drawing - exact comparison with reference image

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

- when IMREAD_UNCHANGED is set in flags, the tiff is read with 4 channels
- adding test for read/write