Mat tutorial - grammar and spelling fixes
simplify the kernel logic when using rect kernel or without ROI
onCameraFrame callback signature changed. CvCameraFame interface added.

New interface allows to get one RGBA or Gray frame from camera or both in the same time;
New interface fixes data rase in samples also.
Android samples updated according onCameraFrame callback signature change.
FpsMeter class removed from Image Manipulations and Face Detection examples as unused code.
remove the warnings in accuracy test
Video IO perf tests guarded.
TBB download and build option enabled for non Android platfroms.
Cross compilation toolchain for arm linux added.
TBB build defines for Linux added.
Code review notes applied.
Toolchain for arm hardfp added.
Compiler and linker flags for arm cross compilation fixed.
CUDA toolkit support added to crosscompilation toolchain.
TBB build for arm linux fixed. Processors count detected correctly.
Carma board support fixed.
Fix some warnings from -O0 build
Merge pull request #444 from taka-no-me:fix_o0_warnings
Code review issues fixed. Compatibility issues fixed.
Added --failed-only option and multiple input files support
BP doc change according to Adrian's request (OpenCV book co-author)
some bugs fix in using AmdFft library