use @joliss's official + tested walk-sync, rather then the one stollen from her earlier gist.
Fix 228, use git+https for insight npm dependency
Group testing related files.
Create tests.js including app and tests.
Add dummy _loader as  workaround for https://github.com/joliss/broccoli-es6-concatenator/issues/9.
Don't include prefix/app -  router on ignoredModules.
Update changelog.
Annotate workaround for require.
Change Changelog entry.
Use double quotes.