Merge pull request #10 from jeremyevans/master

Remove duplicate entries in the method index, fix attribute links
Version bump to 0.2.7
Regenerate gemspec for version 0.2.7
Add support for RDoc 4

This is taken from Atsushi Nagase's changes in his hanna-bootstrap
fork, commit f8f5968c14e0635546bc27ab835296bc6a3c063e.
Bump version to 0.3.0, update RDoc dependency to ~4.0

This contains some other fixes to the gemspec so that current
rubygems will actually build a gem from it.