Fixed Notify <-> NavBar z-index
Major enhancements to Notify

* Object based
* Timeout can be disabled for static notification
* Public close function for closing of notification
* Public clear function to clear timeout
* Public closeAll to close all existing notifications
* Compatibility preserved
Fixing bug for multiple closings
Updated doc
Merge pull request #475 from greensolid/develop

Revision of metro.notify
upd notify, request #475
upd notify, request #475