Remove some of Brian's old notes.
Add a note about sphinxcontrib.programout.
Add a note about testing from the installed package.
Expand and update some of the other text.
Add notes about contacting us.
Whitespace.
Separate out building the docs.

Also reword some things.
Bah.  Remove that period.

What am I?  Strunk and or White?
A capital idea.
Capitalize DistArray; word-wrap; two spaces after periods.
Rerun features to get rid of a warning message.
Add a link to features.ipynb on nbviewer.
Sync the README with docs/source/index.
Merge pull request #567 from enthought/feature/update-docs-for-0.5

Update docs for 0.5