don't explicitely get Ember global
Merge branch 'next' into unglobalize
try to get Ember via require in AMD distribution

also includes better library registration that also works in the AMD build
Merge branch 'unglobalize' into next

Conflicts:
	packages/ember-simple-auth/lib/simple-auth/test-helpers/authenticate-session.js
	packages/ember-simple-auth/lib/simple-auth/test-helpers/invalidate-session.js
	packages/ember-simple-auth/wrap/browser.end
fixed dist build for ember-simple-auth-testing
fixed import