Mock out imports for building api docs.
Add missing modules.
Merge branch 'master' into bugfix/api-docs
Fix formatting in from_global_dim_data docstring.

Sphinx doesn't like subsections under the main sections.
Fix a bad automodule reference.
Fix example formatting in plotting docstring.
Fix docstring formatting in make_grid_shape.
Fix return value formatting.
Fix formatting of other Raises section in format.py.
Make References a subsection of building env modules.
Add one-line description to Texinfo conf.
Bump version in Sphinx conf.
Flatten API reference tree a bit.

Also reorder Other Docs section.
Use |version| rather than |release| in title.

We probably don't need the bugfix number in the title.
Include mock in the requirements.
Update intro text to pull in README bullet points.
Merge pull request #303 from enthought/bugfix/api-docs

Fix docs