Add a more complete set of future.moves stdlib interfaces (issue #104)
Bump version number to v0.13.2-dev
Move check_output implementation to future.backports.misc
Add collections.UserString
Disable test_future_moves_tkinter for now: these imports change the default open() file encoding?!?!
Initial attempt at fixing futurize -d
Remove -d options from futurize and pasteurize for now

- lib2to3 makes some assumptions in the following line:

    assert clipped == [u"\n"] * (lineno-1), clipped

that would seem to preclude extra __future__ or future.builtins imports.
See issue #103.
Merge branch 'issue_103' into v0.13.x
What's New docs: mention removal of futurize/pasteurize -d option
Docs: mention fix for flask compatibility with standard library hooks in What's New for v0.13.0 (issue #79)