Merge pull request #2 from tsquaredp/jshenk

Jshenk
Adds header.html: this file should be referenced and included in every page that will be using the main header
Adds jquery.cookie.js: This jquery library extension includes functions to more easily interact with session cookies
Adds logout.html: this page serves as an exit to a user session; It deletes the current session cookies and outputs a message letting the user know they have successfully logged out
Adds userMsg.js: This javascript file will be used to hold methods in regards to sending messages to other users about ride requests and ride request responses
Updates user.js's login function to use cookies for persistient user sessions
Updates login.html's head tag section
Updates ride.html's head tags, and includes work in progress for adding a new request to join a ride based on GET parameter and parse queries
Updates search.html's head tags and adds reference to include header
Updates styles.css for #header and various related formatting
modidies createUser page to use User object
modidies login page to use User object
modifies User to be a Function Expression Object
adds admin page