OpenCV Version 2.4.6;
OpenCV Manager Version 2.8;
Doc fixes.

Simle Java test for computeCorrespondEpilines added.

Simple set of the camera index to allow the user to change it after the object has been initialized.

A modification of the JavaCameraView is needed to avoid a crash when the
app is exited. It is a good practice to remove the callback after the
stopPreview method.

Also, removed the one from modules/python/src2/cv.py and cleared its
executable bit, since it's not a script.

Front/Back camera constants' values changed;
Additional camera facing check added for JavaCameraView.

OpenCV Manager verison incremeneted;
Docs and tests updated accordingly;
COnstant for Manager initialization added.

Native activity build warning fixed;
Logcat messages for JavaCameraView updated (Bug #2876);
Some fixes for feature #2893 done.

The generated OpenCV Java source can contain characters outside of ASCII on some systems – this patch allows the ant task to compile them.
(cherry picked from commit f3ee55e0)

OpenCV version incremented;
New CvCameraViewListener interface description added.

Manager verison incremented;
Additional constatnt for library intialization added;
Documents updated.

OpenCV build information output to logcat added to OpenCV initialization code;
Documenation for cv::getBuildInformation() added.

In previous version getWidth() and getHeight() values were used instead method parameters.

super.onPause() call moved to begining of onPause method according Google recomandations.

New interface allows to get one RGBA or Gray frame from camera or both in the same time;
New interface fixes data rase in samples also.

This follows SURF changes in 1f261c2f