Support building wheels (PEP-427)

Universal is used to identify pure-Python module(by bdist_wheel). For
these, it is sufficient to build a wheel with _any_ Python ABI version
and publish that to PyPI (by whatever means).

Change-Id: I900a7d2e3777a5c151778679f3049771047855e6
Fix error when run with no arguments on Python 3

Python 3 changed the map built-in to return an iterable instead of a list.
When tested in a boolean context, this always returns True, even if it
would not return anything when iterated.

Instead of the usage being printed, this error was printed:
ERROR: 'Namespace' object has no attribute 'func'

Use list comprehension instead to ensure that an iterable isn't returned

Change-Id: Ie15f2fa8ee93ab26490e371133fa0f944430737b
Closes-bug: 1295356
typo in novaclient

Change-Id: If30543ed7c94cd965f1d6b7f0d4af26b23914ba2
Merge "Support building wheels (PEP-427)"
Merge "typo in novaclient"
Merge "Fix error when run with no arguments on Python 3"