Tutorial for ARM Linux cross compilation added.
Test system refactoring

cmpEps replaced on cmpEps2 to reduce code dublication;
Constants for cmpEps return values added.
OpenCV 2.4.4 preparation

Manager verison incremented;
Additional constatnt for library intialization added;
Documents updated.
updated gpu module API
Fixed documentation build
Merge pull request #521 from asmorkalov:2.4.4_preparation
fix for OpenCV issue #2815

- libavcodec issue
- some decoders alter AVCodecContext width/height values, in a wrong way
- eg. in issue 2815, vp6f decoder changes these values, resulting in distorted / invalid frames
- this patch forces default AVCodecContext values
Merge pull request #520 from jet47:gpu-updates
Fix binary compatibility of gpu module
Repair binary compatibility of ocl module
fix meanShift mismatch on none-double GPUs
fix pyrLK's mismatch on Linux
Merge pull request #526 from taka-no-me:fix_compatibility
Fix the compiling errors of gemm on Linux
Fix ocl::equalizeHist mismatch
Bug #2821 Installation of OpenCV modules breaks build on MIPS Android fixed.

Native camera libs for MIPS installation fixed.
fix the warning on Linux when OpenCL 1.2 not supported
Merge pull request #518 from asmorkalov:ts_refactor
Merge pull request #523 from taka-no-me:fix_2815
Merge pull request #527 from bitwangyaoyao:2.4_fixMeanShift