plugin.xml shouldn't be in source control
deleted unused files
cleanup
updated license, issueManagement, and scm properties
added bean and filter configuration to the plugin instead of making the user do the work
updated to the latest version of the release plugin
converted the filter to Java since filters are called for every request, and the small Groovy performance cost will add up
Merge pull request #1 from burtbeckwith/master

cleanup