Update out.cpp

Fixed a bug with the cv::format(cv::Mat, ...) method for matrices with only one row

see http://answers.opencv.org/question/21201/cvformat-does-not-format-the-way-it-should/?answer=23945#post-id-23945 for details
increase epsilon for MOG2::getBackgroundImage test:

it uses float arithmetics
Merge pull request #2541 from JinoBetti:2.4
fixed C4505
doc typos
Merge pull request #2548 from jet47:gpu_mog2_test
Merge pull request #2551 from ilya-lavrenov:ocl_nonfree
Merge pull request #2553 from ilya-lavrenov:typo
OpenCV version++. OpenCV Manager version++.
Merge pull request #2554 from asmorkalov:ocv_249_version
disable gpu::GeneralizedHough compilation on gcc 4.7
disable GeneralizedHough tests on gcc 4.7
Merge pull request #2572 from jet47:gpu-generalized-hough
Merge remote-tracking branch 'origin/2.4' into merge-2.4

Conflicts:
	modules/core/include/opencv2/core/version.hpp
	modules/core/src/out.cpp
	modules/cudaimgproc/test/test_hough.cpp
	modules/gpu/doc/introduction.rst
	modules/gpu/perf/perf_imgproc.cpp
	modules/gpu/src/generalized_hough.cpp
	modules/nonfree/perf/perf_main.cpp
Merge pull request #2580 from SpecLad:merge-2.4