create basic data package

[adrfried]

Create a basic data package which contains all the media files from data_extern needed to run the basic levels.

For a package being accepted in Debian main or Ubuntu universe, care has to be taken to only use free content.

CC licenses which are DFSG-free:

• CC-BY-SA 3.0
• CC-BY 3.0

Other CC licenses (including those prior to 3.0) are not DFSG-compatible. Content with these licenses may be packaged in an additional non-free package.

See also ​DFSGLicenses.