Fix Python 2 Unicode Problem

When piping to stdout the special handling for Pthon 3 will cause
problems in Python 2 and produce an Unicode encoding error. This commit
separates the output handling of both Python versions.

Signed-off-by: Lars Kiesow <lkiesow@uos.de>

feedgen/__main__.py

@@ -15,7 +15,10 @@ def print_enc(s):
 	'''Print function compatible with both python2 and python3 accepting strings
 	and byte arrays.
 	'''
+	if sys.version_info[0] >= 3:
 		print(s.decode('utf-8') if type(s) == type(b'') else s)
+	else:
+		print(s)