Sticky messages

You can now make a message sticky by setting sticky to true in the flash message options. For example:

Ember.get(this, 'flashes').add({
  message : 'Brown and sticky',
  type    : 'joke',
  sticky  : true
});

addMessage is now deprecated in favour of add, and will be removed in 1.0.0.

Changelog

• Added deprecation warning for addMessage
• Reduced testTimerDuration in flash object test
• Fixed a bug where sometimes flash messages would not be removed