increase epsilon for TVL1 sanity test
increase epsilon for ResizeSameAsHost test
use downscaled frames in FGDStatModel test
fix BGR->BGR5x5 color convertion
Fixed range for 'v' channel for 8U images.
Merge pull request #3137 from akarsakov:fix_cvtcolor_luv_rgb
fix CUDA cvtColor after corresponding change in CPU version

see https://github.com/Itseez/opencv/pull/3137
Several fixes for lintian varnings
Merge pull request #3143 from jet47:cuda-cvt-color-fix
Merge pull request #3109 from jet47:gpu-test-fixes
Merge pull request #3147 from asmorkalov:ocv_deb_lintian_fixes
Can create training set in PNG format

The format of the training set can be changed with the `-pngoutput` key.
Output image will be resized to a 640x480 size if greater.
Typo in string fixed
Class naming update
Documentation improvement
Bug in output format for JPG set fixed
Naming fixes and code beautification
fix CUDA LUT implementation

In CUDA 6.0 there was a bug in NPP LUT implementation (invalid results when
src == 255). In CUDA 6.5 the bug was fixed.

Replaced NPP LUT call with own implementation (ported from master branch) 
to be independant from CUDA Toolkit version.
Merge pull request #3164 from jet47:fix-cuda-lut
Fixed crash in SSE implementation of FREAK descriptor when number of pairs is set to something other than 512.

See http://code.opencv.org/issues/3889 for more details
Merge pull request #3178 from jimcamel:freak_sse_bugfix
No output image resize in case of PNG dataset