Lokaltog/powerline-fonts — pull request #37 by bcbcarl (2013-05-02 22:14:57+00:00)
Title: This one fixed the name of patched Ubuntu Mono fonts (fixes #34)

The name of current patched fonts may violates UBUNTU FONT LICENCE Version 1.0.
Rename it to **Ubuntu Mono derivative Powerline** solve this problem.