Generate sessions controller and tests
Create failing tests
Create sessions routes
Fill in empty actions
Pass tests
Create failing tests for signin with bad info
Create failing tests for signin with valid information
Fix html for bootstrap 3 on users show page
Create full signin page
Display error message on failed signin
Make session help methods available to controllers
Add remember_token to user model
Test remember_token
Complete sign_in function
Include bootstrap js for dropdown menus
Create inverse dropdown menu style
Create signed_in? method to check current_user's status
Alter header menubar when user is signed in
Sign in user after registration
Complete signout process