This contains a few updates to the Enzo README:
Replaced enzo.googlecode.com with references to enzo-project.org or the bitbucket repos.
Added a link to our google+ page.
Added three names (Nathan Goldbaum, Eve Lee, and Yuan Li) to the list of contributors and ordered it alphabetically.
Piggy-backing on this PR is a minor typo correction in the docs for the H2-reg. star maker.