Synnefo

Fix required package name in snf-tools setup.py

Update Astakos conf files in admin guide

Update admin guide to reflect new AMQP settings

Implement Singleton pattern

Implement Singleton pattern inside synnefo.lib.singleton.

Whenever a class inherits from ArgBasedSingleton,
attempts to call the class do not always create a new
class instance, but return pre-existing, already made objects.
...

Minor fixes in README and scripts