fixed the output disparity at the extreme cases (minDisparity or minDisparity + numOfDisp - 1). Thanks to Patrick Mihelich for the report (trac #395)

- imgregion shortcut implemented (CTRL+O)

- imgregion (as with Matlab) implemented

- aspectRatio is controled by cvSet/getWindowProperty

- fix CMake OpenGL compilation

- fix zoom offset of 0.5
- fix CMake problem with QT detection
- Code optimisation

Adapted mtu and packed size
Some minor fixes in gstreamer because not implemented support of v4l v4l2 in the wrapper
default beahvior must be v4l v4l2 or libv4l backends

StatusBar with zoom/color/position information
user can display infor mation in statusbar with cvDisplayStatusBar(window,text,delay_ms)

- fix c++ wrapper
- fix compilation bugs

- fix c++ wrapper
- rename cvInformation in cvDisplayOverlay

Fixed memory leak
Disable QT by default

Fixed bugs indicated by Vadim

Shortcut for zoom (CTRL + and CTRL - for zoomin/out, CTRL Left/Right/Up/Down for panning, CTRL P for zoom = 1)
Fix bug with key event

release

Mouse callback return correct value during zoom/panning
Window overview in zoom mode done !

Mouse callback return correct value during zoom/panning

use inv matrix for Zoom in/out for better result
Fix some bugs with zoom/panning