add Libertine fonts (fork of Linux Libertine/Biolinum)
add Libertine fonts (fork of Linux Libertine/Biolinum)

The 'Linux Libertine' family is a great font family but the original
developer has been inactive for several years and the bug list is piling
up. A fork project know as just "Libertine' has many of the
long-standing issues fixed and has expanded the family with a math font.
The font faces have been renamed to not conflict with the original
project.

scw/homebrew-fonts,zorosteven/homebrew-fonts,unasuke/homebrew-fonts,elmariofredo/homebrew-fonts,kkung/homebrew-fonts,mtakayuki/homebrew-fonts,joeyhoer/homebrew-fonts,herblover/homebrew-fonts,herblover/homebrew-fonts,psibre/homebrew-fonts,scw/homebrew-fonts,RJHsiao/homebrew-fonts,victorpopkov/homebrew-fonts,caskroom/homebrew-fonts,bkudria/homebrew-fonts,bkudria/homebrew-fonts,mtakayuki/homebrew-fonts,andrewsardone/homebrew-fonts,caskroom/homebrew-fonts,sscotth/homebrew-fonts,kkung/homebrew-fonts,alerque/homebrew-fonts,alerque/homebrew-fonts,elmariofredo/homebrew-fonts,kostasdizas/homebrew-fonts,rstacruz/homebrew-fonts,guerrero/homebrew-fonts,zorosteven/homebrew-fonts,victorpopkov/homebrew-fonts,sscotth/homebrew-fonts,RJHsiao/homebrew-fonts,psibre/homebrew-fonts,rstacruz/homebrew-fonts,andrewsardone/homebrew-fonts,guerrero/homebrew-fonts,kostasdizas/homebrew-fonts,joeyhoer/homebrew-fonts