Finished with several samples support, need regression testing

Gave a more relevant name to function (getVotes)

Finished implicit implementation

Removed printf, finished regresion testing

Fixed conversion warning

Finished test for Rtrees

Fixed documentation

Initialized variable

Added doxygen documentation

Added parameter name

initial commit; ml has been refactored; it compiles and the tests run well; some other modules, apps and samples do not compile; to be fixed

reworked nearly all of the OpenCV tests (except for opencv_gpu tests) - they now use the Google Test engine.

limited rng seed choice by 5 values in dtree, boost, rtrees, ertrees tests; hope this make them more stable.