Log message:
Remove PYBINMODULE. All it did was mark some packages as not available
on some platforms that lacked shared library support in the past. The
list hasn't been maintained at all and the gain is very limited, so just
get rid of it.

Log message:
Add .py files to PLIST (Why haven't they been there in the first place? Hm.)

Log message:
Import the ASN1 Python module to pkgsrc. This module allows to dissect
ASN1-encoded files (DER, BER, PER, etc.) in Python. ASN1 is the Abstract
Syntax Notation version 1, as defined by the International Telecommunication
Union (ITU).