Show Person Activity
Merge branch 'master' into issue-4

Conflicts:
	db/migrate/20140305084342_add_person_id_to_messages.rb
	db/schema.rb
Rename MessagesController to ActivitiesController
Change rosources' name in routes (messages->activities)
Merge branch 'issue-3' into issue-4

Conflicts:
	app/controllers/persons_controller.rb
	app/views/persons/show.html.erb
	spec/features/visit_person_activity_page_spec.rb
	spec/routing/routes_spec.rb
Restyle 'Persons' page
Remove the unused spec