Fix variable collision

Had two variables named backlog that represented different things.
Therefore, I changed all variables that held HTML elements to end with
Element.
Add qunit testing framework

Added the qunit files so that I can begin writing tests for my code.
Add qunit code to test page

RallyPlanningPage.html is my test page so I include the qunit files
there.
Backlog.js is upper case

It bugged me that backlog.js and utility.js were lower case so I
changed them to begin with upper case.
Remove tests that don't work.