Implement default config for modules

When a new module is created, the author will include a configuration file with default values. When the module is installed, this file will be copied to the config directory and read into the active store. Future changes will be written to the file in the config directory. This whole process needs to be implemented. I think that one of the big questions is how these files will be discovered. My preference would be that we look for a specially named directory like 'config' and just consider anything in there with a defaut.xml file name to be config that gets moved to the active area. Later we may want to do something where the config files are more specifically declared (in the info file maybe) but I think we can hold that for later.