add +-*/ operators to oclMat
Native testing for OpenCV Manager enabled

All tests added to CMake;
All tests ported on 4 digit version support;
Some test fixes and bug fixes were done.
Bug in hardware ratings fixed.
add oclMatExpr class to prevent extra allocations
fix compiling errors on Linux
more operators use oclMatExpr
Merge pull request #469 from asmorkalov:android_manager_4number_version
fixed problem reported by Thouis (Ray) Jones
Merge pull request #451 from bitwangyaoyao:2.4_operator
Merge pull request #499 from vpisarev:zeroelem_fix
Tutorial for ARM Linux cross compilation added.