use bower managed loader

[stefanpenner]

like: stefanpenner/ember-app-kit@2be295c

• use new loader (8a56a5b)
• use loader from bower (blocked -> loader path cannot have a folder with a period in it. joliss/broccoli-es6-concatenator#6)

[joliss]

So this isn't actually blocking on joliss/broccoli-es6-concatenator#6. There is a collision between a loader.js dir and file when multiple trees get merged, as far as I can see. The only thing we can improve on Broccoli's side is report it more nicely. The solution for this issue would be to figure out where the stray loader.js dir is coming from, and how to keep it out of the output.

[stefanpenner]

Interesting.

Improving broc output would help make this more actionable. I'll try to do my part with long stack traces :)