Modifying setup.py to separate duplicated content.

[dhermes]

NOTE: Has #2392 as diffbase.

[daspecster]

I can't seem to get this to work the way you expect?

>>> B = {'key': 'value'}
>>> c = ([], **B)
  File "<stdin>", line 1
    c = ([], **B)
              ^
SyntaxError: invalid syntax

[tseaver]

@daspecster the ** only works when passed to a callable (the setup() function, in this case).

[dhermes]

Any issues with this PR?

@daspecster If it didn't work, then Travis wouldn't be green 😉

[daspecster]

@tseaver, oh right, deep down inside I knew that.

@dhermes yeah I realized that. I wasn't sure exactly how tox used setup.py or if it cared.