Update gem dependencies
Update D3.js documentation (3.4.2)
Update Node.js documentation (0.10.26)
Update Backbone.js documentation (1.1.2)
Improve RDoc scraper
Update Ruby documentation
Update Ruby on Rails documentation (4.0.3)
Update Python documentation (3.3.4)
Update Prism.js and add C syntax
Add C documentation
Merge branch 'master' of https://github.com/Thibaut/devdocs

Merging with upstream