Add belongs_to associations for user and goal
Add has_many_through association for tracking pinchers of a goal
Add has_many_through association for tracking goals a user has pinched
Add root path and resourceful routes for goals
Add routes for index, new, create and show
Grab all Post objects from db in index action
Add basic html and erb for showing posts and associated data
Add temporary link for adding a new goal
Add horizontal rule under header text
Add html and erb for header
Replace header with rendering shared header
Set up @goal ivar in new action for use model-backed form
Render shared header and add model-backed form for creating a new goal
Add temporary link to all goals