Add to Cart as Guest Closes #44

- the user can now add an item to his/her cart regardless of if he/she
is currently logged into an account
@uptownjimmy - I had to remove the HTML form that was around the HTML
form 'addCartForm' because it was giving me problems; I commented out
the 2 lines necessary for my changes
Merge pull request #60 from uptownjimmy/cartfunctionality

Add to Cart as Guest Closes #44