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

This contribution includes the following logical components into
tracking module:

.) Change Rect to Rect2d into headers for Tracker's methods;
This contribution includes the following logical components into
tracking module:

.) Change Rect to Rect2d into headers for Tracker's methods;
.) MedianFlow tracker;
.) extensible benchmark to compare trackers interactively and
	assess them quantitatively;
.) TLD tracker (work-in-progress);

Work was funded by Google Summer of Code 2014 initiative. Mentors:
Gary
Bradski and Vadim Pisarevsky.

added samples to use retina in its basic form and for HDR tone mapping

More abstract tracker declaration