Added sinatra skeleton to project.
Added routing for creating posts, the post model and the post creation page (which is empty at the moment).
Made the layout for the home page, set up needed variables in the controller.
Added tag routing for the page that shows posts having the selected tag. Created model for tags as well.
Added migration to create the post and tag tables along with their join table. Created join model as well.
Completed routing for the full loop of creating a post. Made the layout for the create a post page as well.