*Added Parcel Backup Support for DB4. Other storages currently do not save
*Added parcelIDList in ParcelManager to speed up parcel fetching at position
*Added ParcelData.cs and ParcelData class for better storage support
*Documentation for parcel added
*2 Parcel Related bug fixes
*Created Parcel class to handle each parcel
*Created ParcelManager class to handle the Parcel Object
*For now, by default it is assigned to a fake avatar key and set for sale to L$0
* Enabled fastmode by default on world map requests (ordinary mode is just too slow)
* Reset some params involving agent appearance
* Tweaked simProfileBlock requests to return values which have been sighted on the wire before.
mingchen