World fix

make ERFilter compile with refactored ml

updates documentation for the text module

Adds OCRTesseract class and sample demo

Adds The exhaustive search algorithm and updates the previous groupining algorithm; Add xml files with default classifier models;

added "text" module; added linemod to rgbd module, fixed compile errors in rgbd

Split highgui module to videoio and highgui

Tracking-Learning-Detection and MedianFlow

Fix include of imgcodecs

fix compiling reg module after separating imgcodecs from highgui