PointsOfInterest - Fourth line of sign now sets POI type.

POI type now read from database.
PointsOfInterest - POI Type permissions

- Dynamic permissions for each type now created.
- Dynamic permissions for each type now enforced.
- defaultPerm for type config now supports "op" and "notOp"
PointsOfInterest - Added "types" action

- New action for listing aviailable POI types.
- Help added for new "types" action.
- Sign help now includes poiType info.
- Teleport help added.
PointsOfInterest - Now using POI Type labels

- Used when switching compass target
- Used when getting compass target summary
- Used when getting POI summary
- Used in map marker description
PointsOfInterest - Don't add markers in worlds without marker support.