Added the tutorial "Using OpenCV Android binary package to compile applications, which use OpenCV from native level".

disable implicit numpy array use in old-style Python bindings because of hard-to-fix memory leaks (ticket #1177)

fixed parallel block matching stereo correspondence algorithm (ticket #997; thanks to jbieger for the patch)

- continuous feature detection
- track verification by reverse tracking

* fixed manually ported classes;
* added vector<vector<Point>> support;
* changed argument types for 3 functions;
* finished tests for org.opencv.core.Core class.