Use Boost's include wrapper for Python.h, and use python includes before any system includes

[SwooshyCueb]

According to Boost's documentation, we shouldn't be #includeing Python.h directly:

If you should ever have occasion to #include "python.h" directly in a translation unit of a program using Boost.Python, use #include "boost/python/detail/wrap_python.hpp" instead. It handles several issues necessary for use with Boost.Python...

Additionally, we are to ensure that any Python headers are included before system/platform headers.

From Boost's documentation:

Be sure not to #include any system headers before wrap_python.hpp. This restriction is actually imposed by Python, or more properly, by Python's interaction with your operating system.

From Python's documentation:

Since Python may define some pre-processor definitions which affect the standard headers on some systems, you must include Python.h before any standard headers are included.

[korydraughn]

Excellent find.