add +-*/ operators to oclMat
Fix several warnings about uninitialized variables from gcov build
add oclMatExpr class to prevent extra allocations
fix compiling errors on Linux
more operators use oclMatExpr
fixed problem reported by Thouis (Ray) Jones
Merge pull request #451 from bitwangyaoyao:2.4_operator
Merge pull request #499 from vpisarev:zeroelem_fix
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