Change build:dist output directory.
Reset Ember dependency to rc.6

According to [the Ember components repository](https://github.com/components/ember), which is where Bower looks for Ember, it hasn't updated to rc.6.1 yet. Resetting this so those getting started with EAK don't have to troubleshoot this error until components updates.
Merge pull request #54 from joefiorini/patch-1

Reset Ember dependency to rc.6
fix typo as per https://github.com/stefanpenner/ember-app-kit/commit/731b1bfbe2026ca7ad7ad0e5aba4823444ec6ed9#commitcomment-3802386

thanks @jedhunsaker
Merge pull request #27 from rjackson/move_dist_from_tmp

Change build:dist output directory. Fixes #21.
Merge branch 'master' of https://github.com/manoit88/ember-app-kit