IE9+ which is lowest that MediaWiki still supports is supposed to
support both ttf and woff par some exceptions.
This reduces uncompressed repo size almost 4000 bytes.
Change-Id: If80f4ec898d86d5fd4cf873d0d86245e66da2f0b
Modern browsers will use woff2, which has smaller size than woff
Updated the README in the font repository explaining how different
file formats are produced.
Bug: T128291
Change-Id: I81c5380fdbf0ff76142b67cf8fce9db20e8164fa