Prep for version 1.3.7.
Merge remote-tracking branch 'origin/v1.x'

Conflicts:
	lib/one_click_orgs/version.rb
CI: Update Travis config with our new branches.
Merge remote-tracking branch 'origin/v1.3.x'
Use released version of rticles.
Upgrade jquery-ui-rails from 3.0.1 to 4.2.0 (updates jQuery UI from 1.9.2 to 1.10.3).
Update selenium-webdriver.
Update parallel_tests.
Update pdfkit to 0.6 series.
Upgrade acts_as_list to 0.4 series.
Update sass to 3.3 series.
Upgrade faker to 1.3 series.
Upgrade uglifier to 2.5 series.
Add note that we can't upgrade sass-rails without upgrading to Rails 4.
Upgrade pdfkit.
Update selenium-webdriver.
Update bundler to 1.6 series.
Let organisation types be disabled for an installation. Closes #471.
Standardise SASS comment syntax.
Split T&Cs and founder warnings into separate, less disruptive places. Closes #282, #313, #473.