Setting for auto-subscribing to new threads in subscribed subforum
Subscribe to new threads in subscribed subforums by default
OAuth dance ends at originating url

Closes #122
Users can unsubscribe from subforums/threads with HTTP GET
Add unsubscribe links to emails
Subscription tests for posts controller
Make sure to check subscribed: true when dealing with subscriptions
Refactor test
Move complex query into a method
Fix route ambiguity and remove unused routes/controller
Fix typo
Remove accidental `p`
Check ActionMailer::Base.deliveries instead of delayed jobs
Fixtures instead of extra queries
More replacing queries with fixtures
Fix tests
Merge branch 'master' into autosubscribe-to-new-threads

Conflicts:
	app/assets/javascripts/client-prod.js
	app/assets/stylesheets/post.css.scss
	db/structure.sql
	test/fixtures/users.yml
Merge branch 'master' into post-numbers

Conflicts:
	app/assets/javascripts/client-prod.js
	app/assets/stylesheets/post.css.scss
	app/views/notification_mailer/broadcast_email.html.erb
	app/views/notification_mailer/broadcast_email.text.erb
	app/views/notification_mailer/new_post_in_subscribed_thread_email.html.erb
	app/views/notification_mailer/new_post_in_subscribed_thread_email.text.erb
	app/views/notification_mailer/user_mentioned_email.html.erb
	app/views/notification_mailer/user_mentioned_email.text.erb
	db/structure.sql