Adds css support for pluginify.

This commit adds css support for pluginify. Test is included in `build/pluginify/test/pluginify_test.js`.
Give tests a longer timeout for closure

Closure can take a long time to complete. The default timeout of 2000ms
isn't enough for some servers, so I'm upping it to 5000ms.
Upping clojure tests to 10s timeout

Travis boxes must be super slow.
Merge branch 'master' into from-html