Closes #1887.

Avoid depending on CPython micro level versions at compile time. Compiling against 3.5.2 does not guarantee that we never get imported on 3.5.1.
Closes #1880.

Add --verbose option for cython magic

Safety fix for #1879: do not raise an exception if setuptools hack fails to apply, but warn about it since it's unclear how to handle such a case.

This fixes issue #1569

Fix abs(long long) test in 32bit MSVC: need to calculate max value in Python as Cython assumes result to be Py_ssize_t (due to sizeof()), which is < sizeof(long long).

Configure another Cython option in test runner from *inside* the shard runner to support non-forking setups (i.e. Windows).

Configure Cython options in test runner from *inside* the shard runner to support non-forking setups (i.e. Windows).