Updated demo description
Updated demo description

Nickster28/cs106a-summer-2017,chrispiech/cs106a-winter-2017,chrispiech/cs106a-winter-2017,chrispiech/cs106a-winter-2017,Nickster28/cs106a-summer-2017,Nickster28/cs106a-summer-2017,chrispiech/cs106a-winter-2017,Nickster28/cs106a-summer-2017,chrispiech/cs106a-winter-2017