Update example_spec.js
Update example_spec.js

So it wont hang forever

re:
http://jasmine.github.io/2.0/introduction.html#section-Asynchronous_Support

fixes #3
ProGM/protractor-rails,tyronewilson/protractor-rails,letmein/protractor-rails,letmein/protractor-rails,ProGM/protractor-rails,tyronewilson/protractor-rails,map7/protractor-rails,map7/protractor-rails