ServiceContainer

Update 1.6

• remove getByNamespace, namespaceExists. Now a single class can be stored multiple times.

Update 1.4 + 1.5

• Added Interface for ServiceContainer
• Added Interface for Wrapper

Update 1.3

• changed createService method access to protected
• updated some DocComments
• removed deprecated method (misspelled exists)

Update 0.1

• Replaced Service Class with Wrapper Class from mesa/Classwrapper
• Added Callback functionality.
• Added wrapper method [addService] to create and add a service object in one single call