Fix several warnings about uninitialized variables from gcov build
Added the predict_all function wrapper for python that was missing from the documentation
Copied the docstring description
Avoid problem of old sphinx reporting an error on lines starting from :

See http://sourceforge.net/tracker/?func=detail&aid=3484857&group_id=38414&atid=422030
Hack to stop parsing of problematic CvStatModel::train definition
Fix warnings about missing parent for class members
Fix several inconsistent declarations identified by check_doc2 script
Add support for enums into rst ocv domain
Whitelist functions/structs in check_docs2 that are impossible to fix in 2.4
Merge pull request #492 from taka-no-me:fix_warnings_gcov
Merge pull request #500 from nielsgm:predict_python_wrapper_to_docs
Merge pull request #503 from taka-no-me:fix_docs
Update samples/python2/hist.py

range in calcHist() changed from [0,255] to [0,256]. Otherwise, it won't count pixels with value 255. It can be verified taking sum of histogram values and checking it with image size.
Merge pull request #505 from abidrahmank:2.4
add openCLExecuteKernelInterop method
Switched to TEST_CYCLE_MULTIRUN for fast tests
Increased time limits
optimized DeviceInfo class and ensureSizeIsEnough
Merge pull request #508 from bitwangyaoyao:2.4_interpKernel
Merge pull request #512 from jet47:core-gpu-updates
Merge pull request #440 from AnnaKogan8:fixed-perfomance-tests