Added the multi tracker class

fixed warnings in the tracking module

Fix for Itseez/opencv_contrib/issues/278 - core dump in the case of no match(...) results.

Adds a first implementation of the OCRBeamSearchDecoder class

TLD fixes & optimizations

Added KCF Tracker Framework

added PASCAL VOC dataset

Adds a first implementation of the OCRBeamSearchDecoder class using the Single Layer CNN character classifier described in Coates, Adam, et al. paper: Text detection and character recognition in scene images with unsupervised feature learning, ICDAR 2011

Added confidence support to disparity filtering

DisparityWLSFilter demonstrated the best results, so I removed all the other
filters. Quality was significantly improved by adding confidence support
to the filter (left-right consistency + penalty for areas near depth discontinuities).
Filter was optimized using parallel_for_ and HAL intrinsics. Demo application was
rewritten for better compliance with OpenCV standards. Added accuracy and
performance tests. Documentation was added, as well as references to the
original papers.

SurfaceMatching: OpenMP indices