Implemented user login and status update

-Using accounts-ui for login functionality
-Created collection isusers to variable isUsers. Did not use Users because the accounts-ui takes that collection name
-Created status field, on submit adds a document to the isusers collection (properties: user, status, createdAt)
-Crated userStatus helper to filter out correct status because each user will only have one status at any given time.
Added login function

-Changed the template 'homepage' => 'home'
-For home, added the login and signup form
-Added helpers that verify login information and sign up information.