Better loading state for the repo-list page

static/js/pages/repo-list.js

@@ -21,10 +21,12 @@
     $scope.page = 1;
     $scope.publicPageCount = null;
     $scope.allRepositories = {};
+    $scope.loading = true;
 
     // When loading the UserService, if the user is logged in, create a list of
     // relevant namespaces and collect the relevant repositories.
     UserService.updateUserIn($scope, function(user) {
+      $scope.loading = false;
       if (!user.anonymous) {
         // Add our user to our list of namespaces.
         $scope.namespaces = [{