Add google analytics
Added `ga_enabled` config variable

This will default to being false. That way you could configure the
account and domain wherever, and only enable it when the application is
deployed to production.
Merge pull request #1 from biola/add_google_analyticcs

Add google analytics
Merge branch 'master' into fix_account_menu

Conflicts:
	README.md
	lib/biola_frontend_toolkit/configuration.rb