Add sqs to list of supported drivers

Just forgotten I presume.
fire app shutdown event.
Added a sample IronMQ configuration.
Added new options to session config.
Exit with artisan status code.
Rename path to files.

Conflicts:
	app/config/session.php
Fix comment.
Added payload configuration option.
Update for optimize command.

Conflicts:
	.gitignore
Setup composer post update script to run php artisan optimize.

Conflicts:
	composer.json
Fix comment.
Added new workbench config file.