Add OGA BY 3.0 to List of FOSS Licenses

[AntumDeluge]

Can OGA BY 3.0 be added to the list of FOSS licenses?

Problem

No problem, just a very common license used with media on OpenGameArt.org. It is essentially CC BY 3.0 without the DRM clause. ~~It is 100% CC BY compatible~~ (it explicitly states that content can be re-licensed under CC BY), but allows for media to be used in DRM-protected software.

Edit: I would have submitted a PR, but I didn't see where the license could be added.