Merge pull request #13 from vlee90/vincent-branch

JavaScript File: Set up Object/Class framework

Comments to how the classes are organized are commented in the code:
Summary:
User --> Rack --> Clothing
Will pass properties of clothing (colors and type) in array form (ex: Clothing(clothingType[0]  --- for "tops"). This makes are code more DRY.
added scrolling function and page updates
Merge pull request #16 from malvinyeung/malvinbranch

added scrolling function and page updates
Add Javascript anticipate drag drop
fix merge conflict in additem.html - easy fix