== TagTools 0.0.3
 * fixed a particularly nasty bug with tag queries on user-scoped tags
 * added a mixin for tag classes
 * improved the unit tests
== TagTools 0.0.2
 * fixed a bug in delete_records for user tag collections
 * added include? method to all tag collections
 * the delete method no longer errors out for nil parameters
 * removed code duplication
== TagTools 0.0.1
 * folksonomy!