What is the fine-grained topic of the following text: "The upgrade of EZ Realty for Joomla 1.6x/1.7x compatibility has been a major upgrade for us, as we've taken the opportunity to restructure EZ Realty into an extensible system of components - so you only need to install what you need to use. Only return the topic.
Upgrade and restructuring of EZ Realty for Joomla 1.6x/1.7x compatibility