Merge pull request #31 from Soylent/master

Take into account relative root path when generating captcha url
According to 622148ef43d0fb9cfd3ed804e1576057d9bd347c gem name has
changed.
Merge pull request #35 from astery/master

Readme touchup.
Bump version
rm attr_accessible
fix for Formtastic::SemanticFormBuilder being renamed to Formtastic::FormBuilder
Merge pull request #37 from amolpujari/master

fix for Formtastic::SemanticFormBuilder being renamed to Formtastic::FormBuilder
Merge branch 'master' of git://github.com/galetahub/simple-captcha