update gemspec to reflect project move

I tried finding the project homepage via
http://rubygems.org/gems/org-ruby but it still links to the old project
page.  This updates the gemspec to point to the new one.

I also updated the primary email and authors, if I may be so bold.  The
email address is the one from the commit log.
Merge pull request #8 from philandstuff/update-gemspec

update gemspec to reflect project move