FIX: Update pybids data directory, unbundle out-of-date numpydoc

[effigies]

Fixes failing Travis builds that depend on sample data in pybids.

Changes proposed in this pull request

• Update pybids data directory

[effigies]

Getting the following error on Circle:

Could not import extension numpy_ext.numpydoc (exception: No module named 'sphinx.util.compat')

Appears that we're manually packaging an old version of numpydoc. I'm switching to the release version, to see if that fixes things. @satra let me know if there's a reason we haven't been doing this up to now.

[satra]

@effigies - when nipype was created a lot of things were copied over from hacks people had implemented. i suspect this was another of those things.

[effigies]

Docs seem to build fine. Good to merge?

[oesteban]

@effigies, you were right: sphinx 1.7.0 has discontinued sphinx.util.compat. For nipype, upgrading numpydoc did the trick.