Dice dependency injection container - now with Namespace support

Please note: This version is not backwards compatible with 1.0 although the changes are minor. All that's changed compatibility wise is the class names used by Dice. To upgrade your project to Dice 1.1 from 1.0, please do the following search/replaces:

new Dice => new \Dice\Dice
new DiceInstance => new \Dice\Instance
new DiceRule => new \Dice\Rule