These test modules were being skipped unconditionally; this is the right way to skip for Python 3
Pretty sure this should fix the issue with automodapi including Cython functions.  Includes a test for this case.
The Cython tests will probably need to ensure Travis has Cython too...
Not all versions of setuptools can be counted on to have this module
Make sure all the required autouse fixtures are included in this test module
Fix typo in cleanup
Use a subprocess to compile the test Cython module rather than running it in the same process; otherwise Cython gets confused when you try to compile the same module of the same name more than once.  This is fine here since it's not the actual build process that's being tested in these tests.
Just isroutine here is fine (it actually calls isfunction internally)
Should probably use sys.executable here
Oops, need to provide a path to astropy_helpers for the subprocess...
Merge pull request #43 from embray/issue-43

Fix automodapi/automodsumm to document Cython functions