do not use include_directories when calling find_package(OpenCV)
This is something that should be left to the user, that's the whole
point of OpenCV_INCLUDE_DIRS.
Update widget_pose.rst

changed Youtube link to our channel
Merge pull request #1801 from vrabaud:master
Merge pull request #1804 from alekcac:youtube_link_fix
compilation & warnings
Fixed compilation errors: removed using namespace from hpp file. This led to pulling cv::ACCESS_MASK to global namespace where conflict with the same name in 'windows.h'
Fixed Viz compilation: removed CV_EXPORTS from cv::viz::Color. The macro forced instantiation of all Matx<double, 4, 1> constructors and triggered StaticAssert there.
fixed warnings
fixed all Viz warnings
moved some headers to precomp.hpp
fixed compilation for vs2008
added viz tutorial 3 test
Viz code beautification
Merge pull request #1811 from Nerei:fixed_some_build_errors