Re-phrased some odd wording.
modify signature of stereoCalibrate for consistency
update doc accordingly
core/utility.hpp missing in flann/timer.h
Fix the bug 3440.
fixing bug #3345
updated decomposeEssentialMat doc
grammar fix
fixing bug #3345. don't use BORDER_ISOLATED alone. it should be combined with some border type
Added optional constraints to non-probablistic hough lines functions
Viz initial backport, compilation fixes, moved viz/viz.hpp header according to 2.4 style
fixed documentation warnings
added guard to prevent linking VTK with Qt5
added cv::GFTTDetector
doc fix
VTK off by default
OpenCV C/C++/OCL/CUDA samples install path fixed. Install rools for tests added.
Code review notes fixed.

Env setup for testing package implemented using /etc/profile.d;
Variable with path for all native samples added;
Path for test binaries and test data updated.
Merge pull request #2209 from asmorkalov:ocv_test_install
Merge branch '2.4' into blur_border_isolated