removed libstdc++ dependency
Detect version of clang compiler
Add OpenCL section to status report
Add separate status section for java
Use git describe to get source control version
Detect and report parallel framework used
Merge pull request #483 from taka-no-me:cmake_tweaks
add description of ddepth param of cv::boxFilter

bug #2709
Merge pull request #479 from ilya-lavrenov:TestHighGUI
Merge pull request #486 from amroamroamro:2.4