Message 287777 - Python tracker

I stopped deprecating PyEval_Call APIs, and removing it's usage in PR 75.

Summary of current pull requests:

PR 87 contains fix regression of PyEval_CallObjectWithKeywords for Python 3.6.

PR 75 is for master branch.  It contains fix same to PR 87. Additionally, PyEval_CallFunction and PyEval_CallMethod is now copy of PyObject_CallFunction and PyObject_CallMethod.  And comment about PyObject_Call preference is added.