Bring `apitools` Python3 support.

[dhermes]

See @craigcitro comment.

PS Craig, https://github.com/google/protorpc does not have issues turned on.

[craigcitro]

@dhermes thanks for the heads-up! fixed.

[dhermes]

Filed there too. /cc @tseaver

[craigcitro]

quick question for @tseaver: when you applied the python-modernize changes to this repo, did you use any special flags?

[tseaver]

I don't recall any flags (the fixer I wanted to disable was adding from __future__ import absolute_imports, but I couldn't figure out how).

My memory is that I generated a patch file and edited it to remove that import and correct for some other wonkiness.

[craigcitro]

OK, we're now much closer: https://pypi.python.org/pypi/google-apitools

i've also done a massive update from internal, and merged in the gsutil fork. we're unblocked on better py3 support, IIUC.

my next step is to move gsutil over to using this code as a submodule. along those lines, i noticed that one of the changes in 901342e seemed to cause some unicode-related issues when i ran some (still-only-internal) tests; since it's late, i just stripped it out for now, but i think that one might require some digging.

[dhermes]

w00t

[craigcitro]

OK, i made a small effort here in 3c522a4 ... but there's still hard work to be done.

in particular, i need a plan to update or drop gflags and apputils. ugh.

[dhermes]

Drop, drop, drop, drop! Woo hoo!

Make them optional in setup.py and then everyone is happy. You can go back to the origin old_run.py in oauth2client to see how we ditched gflags there. (I think you were part of those code reviews way back when.)

[dhermes]

@craigcitro Can this be closed? Are gflags and apputils dropped?

[craigcitro]

So gflags and apputils aren't gone, but i at least have a plan in place. given what you did in #5, i'm gonna close this, and open a new issue to completely drop those dependencies.