Replace distribute_setup.py with ez_setup.py

and ``setuptools_bootstrap.py``
Merge pull request #38 from mwcraig/patch-1

Replace distribute_setup.py with ez_setup.py
Support `setup.py test --coverage` in affiliated packages.
Merge pull request #39 from mdboom/coverage

Support `setup.py test --coverage` in affiliated packages.
Simplify package-template usage and updating by requiring fewer files to
be edited.
Add information about pulling changes to package template
Store stuff in "metadata" section, not "affiliated" section.
Insert space before comment.
Fix documentation build
Change ``clean`` rule to remove generated docs

Made necessary by https://github.com/astropy/astropy/commit/b94fd38e5613c838c41ef5fa57ed9ba8289b5046
Elaborate on the need to search for .c files in a comment.
Merge pull request #41 from mdboom/auto-setup

Simplify package-template usage
Merge pull request #42 from mwcraig/patch-2

Change ``clean`` rule to remove generated docs
Use Python 2 /3 compatible source (no 2to3)
Remove bundled astroquery/extern/six.py
Use astropy.extern.six instead of Astroquery bundled version
Fix monkey patching of urllib in test_utils.py
Fix ImportError on Python 3
Python 3 fixes (so that it works without 2to3)
Minor Python 3 fix in splatalogue pointed out by @keflavich