Merge pull request #489 from CoderCow/patch-1

Region Command Improvements, Fixed /who
-Added "-p" parameter to "/region name" for persistent mode, type "/region name" without "-p" to disable.
-Added "-u" parameter to "/region name". Use to include unprotected regions in the listing.
-Added "-z" parameter to "/region name". Use to include z indexes in the listing.
-Regions displayed by "/region name" are now sorted by z index.
-Added "-d" parameter to "/region info". Use to display the given region's boundaries as wires.
Fixed all region command syntaxes.