add support for python 3 to remaining genshi.template components: * minor changes to track encoding=None API change in core genshi modules. * genshi/template/directives: * slightly odd syntax changes to make the 2to3 .next() fixer pick up *stream.next() * minor test fix for change in behaviour of division (/) in Python 3. * genshi/template/loader: * add 'b' to file modes to ensure it's loaded as bytes in Python 3. * use not isinstance(s, unicode) instead of isinstance(s, str) since the former is correctly converted by 2to3.

#!/bin/sh
#
# Script to run 2to3 on files not covered by setup.py
#
export PYTHONIOENCODING=utf8

# General 2to3 run
2to3 -w --no-diffs examples/