Added support for various advanced config

Added Support for:
 - Routes
 - Qeueues
 - Exchanges

To be declared on a per-tasks basis and beyond the default
configurations `celery`.
added improved date handling for props

`eta` --> `\DateTime`
`expires` --> `\DateTime`
Merge branch '0.1.0-dev' into 0.1

Conflicts:
	composer.json
Merge branch '0.1' of github.com:zircote/Rhubarb into 0.1

Conflicts:
	library/Rhubarb/Rhubarb.php