Implements a base-pet-themed set of avatar skins and head accessories, the latter of which has additional handling for the user to purchase them from the Avatar Customization page.
* Added a Grunt task to precompile website/views/shared/new-stuff.jade to a
static html file.
* Updated the new-stuff.jade modal template to use a $rootScope property.
* Added a special case to openModal for the newStuff template, by which it
fetches the flat file, marks it as trusted HTML, and sets it to the
$rootScope property before rendering the modal.