Don't add 'constructor' as a dependent key
Merge pull request #37 from kongregate/fix-constructor-dependency

Don't add 'constructor' as a dependent key
wrap if statements with only consequent in {} too
update generated file too
import Ember before compiling js code

Ember script generates

var get$ = Ember.get

before our own code gets compiled. This leads in tests to a missing
Ember exception because our own imports are processed afterwards. See
https://github.com/ghempton/ember-script/issues/44