Changed the interface of the per-object garbage collection to add the address of the agent pointing to it. This permits finer grained garbage collection.

The agent now carries its own timeout (defaulting to 60s).
The unit test now validates that the 2 agents were cleared from the agent register.

Added support and unit test for object creating calls in RootEntry (DriveRegister, TapePool, AgentRegister)

Added support for creation of tape pools and agent register and created a unit test for agent register creation.

Renamed the setName/GetName functions to the more appropriate getAddress/setAddress.

Created a richer protocol buffer RootEntry object and created a parital implementation to allow unit tests to run.

License comment is no longer filtered out by doxygen when generating web pages of the individual source files.