Fix indentation error revealed by 2.6 testing
Handle 2.6 quirk with extra trailing NEWLINE marker
Add gen_for as a python2.6 token, vs. comp_for (or equiv)
Mux on str behavior for xml package from python 2.6
Handle python 2.6 context managers (with_item vs. with_var)
Merge branch 'py26'
Bump version for python2.6 support
Remove references to iteritems -> items (for py3k support)
Remove refs to bare StringIO (io.StringIO) (for py3k support)
Always get StringIO as an object, not a module (for py3k support)
Replace all basestring instances with str (for py3k support)
Replace print with print() function on auto-out (for py3k support)
py3k: handle __next__ generator behavior
py3k use print functions in tests