Ensuring globally unique ids for FMeObjects and allowing retrieval by id from application

[chrfrantz]

FMeObjects should have a globally unique id (via UUID) and ControlCenter should allow access to objects by id (via ObjectManager). Application developers can then access objects by id when they are interested in one specific object repeatedly instead of iterating through all shared objects.

[chrfrantz]

Java implementation now uses UUIDs for id generation. IDs are saved as Strings to allow the use of other mechanisms to generate IDs. lookupById() is already existing. Creates unified collection of own and others' objects on the fly. Quite inefficient. Separate HashMap with IDs as key would improve performance...