docs(tutorial/step_12): clarify that jQuery should be loaded first
docs(tutorial/step_12): clarify that jQuery should be loaded first

jQuery needs to be loaded before *all* AngularJS modules in the app,
because otherwise AngularJS will not detect the presence of jQuery and
animations  will not work as expected.

ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js