[#3] Fix guide styling - explicitly require jvert-tabs (no require_tree)
[#7] Update ruby to 1.9.3-p448, use generic .ruby-version
[#7] Upgrade rails to latest 3.2.14

* http://weblog.rubyonrails.org/2013/7/23/Rails-3-2-14-has-been-released/
[#6] External links open in new window.
[#6] External links have icon, except footer and 'Get Started' button.
[#11] Twitter button for all three article types, styled next to h1.
[#6] External links open in new window.
[#6] Add small amount of top-padding to the Beta logo.
Merge branch '6-fix-external-links'
[#3] Merge branch 'master' into 3-fix-guide-styling

Conflicts:
	app/assets/javascripts/application.js
Merge branch '3-fix-guide-styling'
[#7] Merge branch 'master' into 7-upgrade-ruby-rails
Merge branch '7-upgrade-ruby-rails'
[#13] Default installation of rollbar
[#13] Don't monitor exceptions in development or test

Only production and staging environments.
[#13] Specify rollbar version in Gemfile
[#13] Remove whitespace in Gemfile version declaration
Merge branch '13-exception-reporting'
[#11] Merge branch 'master' into 11-articles-can-be-tweeted
[#11] Twitter button also on old HTML articles.

* Only QuickAnswers and WebServices, since HTML articles predate Guides.