Prefix first, last and shown css classes
Add the ability to return full message option objects from handlers.
Add tests for option passing from handlers
Merge pull request #42 from deoates/master

Added ability to pass an object out of handler
Fix shown class reference
Rebuild
Merge branch 'master' into develop

Conflicts:
	CHANGELOG.md
	build/js/messenger.js
	build/js/messenger.min.js
Bump version
Action handlers now have references to the message they're the action of
Allow progress, success and error messages to be supplied as functions.  Fix bug with how messages are handled in run.
Add support for promise based actions
Update build format to not include dates