ADD localities controller with index (localities chart) and show (locality page) actions;
ADD texta-align-center & titleize bricks;
REF chart css style rules move from tags.css to scaffold.css;
ADD localities chart link to site navigation menu;
REF typo in tags#index page;
ADD hide behavior to "check in" button when user already check-in;
ADD show up "explore it" button when user already check-in;
ADD route for localities#index & localities#show;
ADD p, ul tag style;
REF .titleize brick into .font-large & .uppercase bricks;
ADD .submit-button;
ADD display user's check-ins on user#show (profile) page;
ADD time formats in en.yml locales;
DEL duplicative routes.