release.txt

* Regenerate Timezone modules if necessary (rake build_tz_modules)
* Update CHANGES
* Update version number in Rakefile
* Regenerate rdoc (rake rdoc)
* Build new gem, zip and tar.gz (rake package)
* Commit and tag release
* Upload gem, tar.gz, zip to rubyforge.
* `gem push` new gem to gemcutter.
* Upload documentation to rubyforge.
* Write news item / announcement mailing list post.
* Update RAA page (http://raa.ruby-lang.org/project/tzinfo).