I've seen a lot of tutorials on how to create a custom module in Magento. But all of them are mostly those helloworld examples.
I'm wondering what files do we actually have to create in order to just create a module that's been reckognized by the system.
What are the only important files that have to exist for the module? I'm thinking that only confing.xml and namespace_Modulename.xml are needed for a new module and everything else is like extra for that (example showing stuff on the page etc).