Fix typos in README

Missing " characters meant that this wasn't valid ruby...
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 #7 from philandstuff/fix-readme-typos

Fix typos in README
Merge pull request #8 from philandstuff/update-gemspec

update gemspec to reflect project move
Use ternary operators in 'html_output_buffer.rb'.
Modify raw HTML examples and their output.
Add the support of raw HTML "@@html:<text>@@".
Modify the `rake test` so that it reports correctly whether build breaks...
Update markdown examples
Merge remote branch 'origin/master' into implements-code-blocks-exports-options