Implement a click-to-view spoiler system

app/assets/javascripts/components/actions/compose.jsx

...sets/javascripts/components/components/status_content.jsx

...s/components/features/compose/components/compose_form.jsx

...ts/features/compose/containers/compose_form_container.jsx

app/assets/javascripts/components/reducers/compose.jsx

app/assets/javascripts/extras.jsx

app/assets/stylesheets/components.scss

app/controllers/api/v1/statuses_controller.rb

app/helpers/atom_builder_helper.rb

app/lib/formatter.rb

app/models/status.rb

app/services/post_status_service.rb

app/services/process_hashtags_service.rb

app/validators/status_length_validator.rb

app/views/api/v1/statuses/_show.rabl

db/migrate/20170112041538_add_spoiler_to_statuses.rb

db/migrate/20170114014334_add_spoiler_text_to_statuses.rb

db/schema.rb