Simple update to getting-started.md
Simple update to getting-started.md

To the Ember newbie, calling the folder 'new-app' was confusing - one of the students thought there must be a 'new-app' folder inside the new application.  Calling it 'hello' - what we just named it with 'ember new hello' is more clear
isleofcode/ember-cli-cordova,isleofcode/corber,AVCEngineering/ember-cli-cordova,AVCEngineering/ember-cli-cordova,hashg/ember-cli-cordova,isleofcode/ember-cordova,isleofcode/ember-cordova,aquadigital/ember-cli-cordova,greis/ember-cli-cordova,bterkuile/ember-cli-cordova,swastik/ember-cli-cordova,isleofcode/corber,swastik/ember-cli-cordova,greis/ember-cli-cordova,isleofcode/ember-cli-cordova,gordonbisnor/ember-cli-cordova,poetic/ember-cli-cordova,gordonbisnor/ember-cli-cordova,poetic/ember-cli-cordova,hashg/ember-cli-cordova,aquadigital/ember-cli-cordova,bterkuile/ember-cli-cordova