Fix the bug 3440.
Add support to bool type

Add the bool support to the get function
Added get and set for extra PVAPI property: CV_CAP_PROP_FRAMESTARTTRIGGERMODE
Added PVAPI enums to highgui.hpp
Added "PVAPI_" prefix to FrameStartTriggerMode definition
Added missing comma in enum.
Update py_image_display.rst
Update py_image_display.rst

OS information removed.
fixed examples for opencv 2.4.8
fixed whitespace
proper initialization for ccimpl in bool CascadeClassifier::read(const FileNode
decrease input size for several gpu tests to fix "timed out" error:

* BruteForceNonLocalMeans
* OpticalFlowBM
Fixed Cl.exe hang for VS2008 x64 with Eigen::exp() function
Merge pull request #2309 from Nerei:fixed_cl_exe_hang_with_eigen
Merge pull request #2308 from jet47:gpu-tests-timeout
removed whitespace at end of line 96
typo
Merge pull request #2314 from ilya-lavrenov:typo
added performance tests for NLMeans
Workaround a LLVM/Clang 3.3 bug.

The LLVM/Clang 3.3 has a bug when compile a cl kernel with
assignment of a scalar to a vector data type. This patch
could work around this bug.

Signed-off-by: Zhigang Gong <zhigang.gong@intel.com>
Updated DisplayImage.cpp program to compile

CV_WINDOW_AUTOSIZE -> WINDOW_AUTOSIZE