fix for cv::LUT and cv::transpose

initialization time.

* Drop some low level API
* Remove outdated overloads
* Utilize Input/OutputArray

Made all STL usages explicit to be able automatically find all usages of
particular class or function.

removed rarely used fixed_size parameter from AutoBuffer type, added optional AutoBuffer* but to cvarrToMat in order to speedup CvSeq->Mat conversion; finished conversion of convex hull and related functions to C++

This reverts commit 94b97b7a.