- improved CV_IN_OUT/CV_OUT handling for generated Python/Java wrappers

a lot of small corrections to bring down the number of undocumented functions, reported by the script; added em.cpp sample

started work on API & doc synchronization (in particular, Mat& => Input/OutputArray in the descriptions)

replaced "const InputArray&" => "InputArray"; made InputArray and OutputArray references. added "None()" constant (no array()).

- static class member modifier processing is fixed (moved from 'rettype' to 'func_modlist')

moved Python bindings source code into src subdirectory; preparing to add python/doc and python/test subdirectories

extended Python bindings; not merged into cv.cpp yet; and many of the helper functions, like pyopencv_to_*, pyopencv_from_* etc. are still missing