Enable arguments with spaces in alias definition

[Xfel]

This is the solution for #464. It supports both using quotes as understood by shlex in the string and using a yaml list to specify the single arguments.

The only downside to this is that it uses the function pipes.quote which is apparently deprecated.

[wjwwood]

The logic behind the changes lgtm. I also think you got all the places that needed to be touched (it's hard to be certain though).

However, one of the tests are still failing:

======================================================================
FAIL: tests.unit.test_config.test_get_verb_aliases
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/travis/virtualenv/python2.7.13/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/travis/build/catkin/catkin_tools/tests/utils.py", line 137, in decorated
    return f(*args, **kwds)
  File "/home/travis/build/catkin/catkin_tools/tests/unit/test_config.py", line 80, in test_get_verb_aliases
    assert aliases['b'] == 'build'
AssertionError
----------------------------------------------------------------------

So I'll approve this when that's fixed.

Thanks!

[Xfel]

Please excuse the two commits, I couldn't get the tests to run on my machine, so I had to push and let travis do the work. Those issues should be fixed now. I did however find another issue that is not covered by the tests, comes from a moved function between python2.7 and python3.4. What is the recommended way to deal with this issue?

[wjwwood]

lgtm now, thanks!

[wjwwood]

Please excuse the two commits, I couldn't get the tests to run on my machine, so I had to push and let travis do the work.

No worries, I'll squash with GitHub when merging.