Jinja support and Python 3

[drcongo]

Caching Jinja templates with cacheops under Python 3 throws the error 'TokenStream' object has no attribute 'next'

File "/usr/lib/python3.6/site-packages/jinja2/environment.py", line 497, in _parse
    return Parser(self, source, name, encode_filename(filename)).parse()
  File "/usr/lib/python3.6/site-packages/jinja2/parser.py", line 901, in parse
    result = nodes.Template(self.subparse(), lineno=1)
  File "/usr/lib/python3.6/site-packages/jinja2/parser.py", line 883, in subparse
    rv = self.parse_statement()
  File "/usr/lib/python3.6/site-packages/jinja2/parser.py", line 137, in parse_statement
    return ext(self)
  File "/usr/lib/python3.6/site-packages/cacheops/jinja2.py", line 22, in parse
    parser.stream.next()
AttributeError: 'TokenStream' object has no attribute 'next'

I think the issue is that in Python 3 this should be using next(parser.stream)

[Suor]

I will look into it