Allows multiple contexts to be passed to Ember.State.transitionTo either as multiple arguments or as an array of contexts within an event.

Changed StateManager.send and sendRecursively to allow multiple context arguments.

Ember-views is now an optional dependency for ember-states.  It is only required in the test file.

For the purposes of the test suite Ember.$.Event is required to exist.  We can just use an empty function rather than requiring all of ember-views.