Fixed the build system by allowing two concurrent themes.
Write the docs unconf slides
Merge pull request #10 from oncletom/wtd-unconf

Write the Docs Unconference Berlin slides
Seeding and farming Open Source code at the BBC.
Outro for the open source summary.
Update the role.
DevCon resources.
Added a new quote from http://www.theguardian.com/media/2014/aug/19/-sp-bbc-report-news-broadcasting
Update outline.md
assemble -> gray-matter
Updated abstract and layout.