bug report and fix: template over-rides being ignored for category listings

Thanks for the feedback, uptoeleven. That false/true switch isn’t technically a bug—we left it as false because overriding that template when you don’t have a full grasp of what you’re doing with WordPress API can be dangerous. Obviously, that’s not the case with you and that’s great. ?? We’re considering opening up all templates but in order to do so to avoid massive support headaches, we need to provide substantial documentation on what is allowed to override on these templates and what you have to maintain in order not to break the plugin.