Generate sessions controller and implement new action.
Add authentication system for signing users in and out.
Require user to sign in before accessing any pages.
Restrict elements to be only those of the current user.
Add links to signin pages.
Add more restrictions to events for current user.
Log user in when they create an account.
Add getting started info.
Make sure require_signed_in_user executes before other filters.
Account for authorization system in tests.
Use password fields in sign up form.
Fix password error message and validation spacing.
Validate that groups and colors have a user.
Enforce minimum length on user password.
Add tests for sessions controller. Closes #57.
Merge pull request #55 from msrose/feature/user-signin

Feature/user signin