Options for linenos and start are ignored and result in no highlighting

[detly]

Using the triple backticks with options linenos:true and start:5 result in no highlighting and verbatim rendering of those options in the code.

Here's the codefence part of the source:

```c
const int magic;

const int not_magic;

Here's a screenshot:

![octopress cf bug](https://cloud.githubusercontent.com/assets/311239/13207365/c70c5000-d961-11e5-907a-7771e3cea64d.png)

To reproduce:

First, write a Gemfile containing:

source 'https://rubygems.org'

gem 'octopress', '~> 3.0'

Then run `bundle` (I did this under an RVM managed Ruby 2.3.0).

Then do `mkdir src` and run `octopress new src`.

Then do

cd src jekyll serve

The results of this are at https://github.com/detly/octopress-test

I'm doing this on Ubuntu 14.04.1 with an RVM installed Ruby 2.3.0. Gems installed (purely from the `bundle` command) are:

Using colorator 0.1 Using ffi 1.9.10 Using sass 3.4.21 Using rb-fsevent 0.9.7 Using kramdown 1.9.0 Using liquid 3.0.6 Using mercenary 0.3.5 Using rouge 1.10.1 Using safe_yaml 1.0.4 Using redcarpet 3.3.4 Using titlecase 0.1.1 Using bundler 1.11.2 Using octopress-deploy 1.3.0 Using rb-inotify 0.9.7 Using jekyll-sass-converter 1.4.0 Using listen 3.0.6 Using jekyll-watch 1.3.1 Using jekyll 3.1.2 Using octopress-escape-code 2.1.1 Using octopress-hooks 2.6.1 Using octopress-code-highlighter 4.3.0 Using octopress 3.0.11 Using octopress-codefence 1.7.0

[detly]

It looks like this might be related to my other installation woes. I'm not really sure where I've gone wrong, but perhaps I'm using the wrong version of Jekyll.