Explicitly use backlogElement

On the main page I had two variables named backlog one to refer to the
object and the other to review to the HTML element that contained the
backlog. In a previous commit I added Element to all the HTML element
variables I used but missed adding it in this one place. This fixes the
previous bug.
Remove logging

Removed an unnecessary debug logging command.
Test getting seurity token from Rally

After adding a test harness to my app I now want to start using it. The
first functional test I want to add is to test manipulating stories. In
order to create a test story in Rally I will need to get a security
key. This commit tests the retrieval of said key.
Remove unused code in RallyWebService