It is recommended to always define PY_SSIZE_T_CLEAN before including
Python.h. Cf. https://docs.python.org/3/c-api/intro.html
This avoids errors like:
SystemError: PY_SSIZE_T_CLEAN macro must be defined for '#' formats
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Remove duplicate (aside from comment formatting) embed15.i.
Remove references to Python 1.5.
Tested and remarkably still works with Python 2.7, so update
documentation and comments to reflect that.