Rename SaveFavorites js function to FavoriteAjaxPreparer

- Function is responsible for getting sessionStorage data and extracting the band id's from the favorite list.
- Band id's are then sent in a json object when the user creates an account
Merge pull request #107 from spring-peepers-2014/jasmine-unit-tests

Rename SaveFavorites js function to FavoriteAjaxPreparer