Update quickstart.hbs

Fix the error due to outdated ol.source.MapQuestOpenAerial() because of this feedback https://groups.google.com/forum/#!topic/ol3-dev/6xi2n7nMg8k on the ML
Update quickstart.hbs

Fix on the fix ;) because a removed new via the Github UI
Merge pull request #1500 from ThomasG77/patch-1

Update quickstart.hbs