Configuration renames

- Add example to  Sim/Modules/Advanced.ini
- remove example for Sim/Physics/Physics.ini
GridService - minor corrections
Estate operations rework

SystemEstateService
- Move all estate commands from EstateInitializer for grid use/access
- Additional commands:
  — show estates & show estate regions
 - Include additional checks for changes in the configured system owner
name and system estate name

EstateInitializer
- ‘estate change’ is the only region applicable command
- Update estate operations for region creation and inclusion in an
estate.
 -  An estate MUST exist before a region can be included.
 -  A region can be ‘parked’ with the system owner/estate and later
moved to a user estate
 - Mainland regions will ALWAYS be included in the system estate

LocalEstateConnector
 - correct ID number returned for user accounts