CachedSupermodel 0.1.2.1

Based on cached_model by <a href="http://dev.robotcoop.com/">robotcoop</a>. We started out with their code, but added so much that it merited its own plugin. Apologies for not doing proper contributions to their project instead of building our own, but we are limited by commercial requirements rather than open source idealism. == FEATURES/PROBLEMS: * Through associations are not invalidated _at_all_ in the end association right now. Ex: * User has_many :taggings * User has_many :tags, :through => :taggings, :source => :tag * If you now remove tags without removing taggings the user will still have those tags in the User#tags collection. == SYNOPSYS: