client:

- status.rodb
	* contains the list of installed packages with metadata
- packages.rodb
	* contains the list of available packages with metadata, and details of the repositories
	they are available from.

repo:

- meta.rodb
	* contains information about the repo itself, including name, description, available channels, target system, and available news items.
	* this is the database that will be downloaded when a client adds a repo
	or refreshes their repo database.

- channels/$channel/packages.rodb
	* contains the list of available packages with metadata.
	* when a client refreshes their repo database, it will download
	the packages.rodb file from every channel it has registered, and will
	merge the contents into its local copy of packages.rodb