neovim/neovim — pull request #948 by justinmk (2014-07-13 16:23:11+00:00)
Title: travis CI: enable APT cache

ref https://github.com/neovim/neovim/issues/905#issuecomment-48843758

http://blog.travis-ci.com/2013-12-05-speed-up-your-builds-cache-your-dependencies/