Adds support for DB.pget and DBCursor.pget methods.

Based on a patch supplied by Ian Ward <ian@arevco.ca> on the pybsddb
mailing list 2004-03-26.
diff --git a/Lib/bsddb/dbobj.py b/Lib/bsddb/dbobj.py
index abda657..3bafafa 100644
--- a/Lib/bsddb/dbobj.py
+++ b/Lib/bsddb/dbobj.py
@@ -134,6 +134,8 @@
         return apply(self._cobj.fd, args, kwargs)
     def get(self, *args, **kwargs):
         return apply(self._cobj.get, args, kwargs)
+    def pget(self, *args, **kwargs):
+        return apply(self._cobj.pget, args, kwargs)
     def get_both(self, *args, **kwargs):
         return apply(self._cobj.get_both, args, kwargs)
     def get_byteswapped(self, *args, **kwargs):