yihui/knitr — pull request #603 by krlmlr (2013-09-16 19:50:47+00:00)
Title: Speed up Travis-CI builds

Not installing LaTeX docs reduces download size by about 2/3 and saves up to two minutes run time for each build.

Installing basic CRAN packages (4342273) seems to be necessary, too. See the [build history of my fork](https://travis-ci.org/krlmlr/knitr/builds).