- 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.

Java API: fixed problems in video and ml modules; generated test stubs for all exported functions (now we have 1701 tests).

Testing: 1178/4/576

Testing: 1176/4/580

Java API: (per code review) adding check (data.length % CvType.channels(t) != 0) for Mat:: put/get, adding 2 tests for them
Testing: 1176/4/580

JavaAPI: fixed typo; some constants are moved to private section; added tests for BruteForceMatcher-Hamming

Testing: 1130/0/584

fixed 8-point case in findFundamentalMat (ticket #1262). findFundamentalMat needs to be rewritten actually (as well as findHomography)

Testing: 1130/0/585