Extract general agent-related information (Name, Symbol) into Agent.Information property
Move namespace 'Agents' away from 'Service' namespace
Refactor AgentLibrary

ControlCenterServiceClient extended with Agent Manager's functionality.
Removed Agent Manager.
Agent Library refactoring

'Library' is implemented as singleton now.
Only 'Connect' method is left - it returns 'id' for connection.
ControlCenter Service Client now can be recieved via 'Library.Clients[id]'. Therefore to make any action on service, method on 'Client' have to be called