Update dependencies in README to include latexmk

README.md

@@ -38,6 +38,7 @@ ShareLaTeX should run on OS X and Linux. You need:
 * [Node.js](http://nodejs.org/) 0.10 or greater
 * The [grunt](http://gruntjs.com/) command line tools (Run `npm install -g grunt-cli` to install them)
 * A local instance of [Redis](http://redis.io/) and [MongoDB](http://www.mongodb.org/) running on their standard ports.
+* An update to date version of [TeXLive](https://www.tug.org/texlive/), with the `latexmk` program installed (should be included by default in TeXLive).
 
 Config
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