added OAuth2 authorization strategy
less spaces
make the authorizer strategy configurable
better method name
removed extra strategies folder
pass authorizer class, not instance
always use normalized session data keys
moved test to correct location
draft of strategies - tests and examples broken ;(
Merge remote-tracking branch 'origin/master' into strategies

Conflicts:
	packages/ember-simple-auth/lib/mixins/login_controller_mixin.js
	packages/ember-simple-auth/lib/session.js
	packages/ember-simple-auth/tests/session_test.js
don't prefix private methods with _
store was moved to session
draft implementation for Cookie.stores
use Ember.A
cleanup, TODOs
fixed most examples
updated gems
default to OAuth2 authenticator
update git before running the tests
fixed .travis.yml