Add a page title to every page.

CHANGELOG

app/controllers/admin/application_controller.rb

app/controllers/dashboard/application_controller.rb

app/controllers/dashboard/groups_controller.rb

app/controllers/dashboard/milestones_controller.rb

app/controllers/dashboard/projects_controller.rb

app/controllers/dashboard_controller.rb

app/controllers/explore/application_controller.rb

app/controllers/explore/groups_controller.rb

app/controllers/explore/projects_controller.rb

app/controllers/groups/application_controller.rb

app/controllers/groups/avatars_controller.rb

app/controllers/groups/milestones_controller.rb

app/controllers/groups_controller.rb

app/controllers/help_controller.rb

app/controllers/invites_controller.rb

app/controllers/oauth/applications_controller.rb

app/controllers/oauth/authorizations_controller.rb

app/controllers/oauth/authorized_applications_controller.rb

app/controllers/profiles/accounts_controller.rb