plugin.xml shouldn't be in source control
upgrade to Grails 2.x, added dependency for jcaptcha and release plugin
added grailsVersion, license, issueManagement, and scm properties
throw IllegalArgumentException -> throw new IllegalArgumentException
Merge pull request #2 from stokito/patch-1

throw IllegalArgumentException -> throw new IllegalArgumentException
Merge pull request #1 from burtbeckwith/master

updates needed for publishing
Merge remote-tracking branch 'upstream/master' into wiki