Add SIL OFL v1.1 for Bebas Neue.

[oznogon]

This adds the SIL OFL v1.1 license file, per the creator's license:

When you will download Bebas Neue, Bebas Kai , please follow SIL Open Font License 1.1.

Per SIL OFL 1.1:

Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user.

[daid]

Ah, missed that part. When the font was suggested, I did check if we could use it, but I must have missed this detail. Great for pointing it out!