Add an AlgorithmManager class to control the Algorithm instances

[NickDraper]

Add an AlgorithmManager class that inherits from AlgorithmFactory.
The job of this class is to
- provide a facade for the factory (code should not call the Factory Direct)
- To maintain a list of all the algorithms that have been served out of the factory to allow the proper finilization and destruction.
- You may want to implement this as an instance of a DataService

[NickDraper]

This issue was originally trac ticket 33