Handle case where template file doesn't exist. If a template file is a dangling symbolic link, it used to raise a "TypeError: 'NoneType' object is not iterable". Replace that useless error with a NoTemplate exception reporting the problem file.

#!/usr/bin/env python
from __future__ import print_function
import zlib, base64, sys
print(base64.encodestring(zlib.compress(sys.stdin.read())))