Add option to not delete FPlayer data on auto leave.

This allows servers to only have the player leave the faction. Also prevents players from staying offline until their power resets.

src/main/java/com/massivecraft/factions/util/AutoLeaveProcessTask.java

@@ -61,7 +61,9 @@ public class AutoLeaveProcessTask extends BukkitRunnable {
 
                 fplayer.leave(false);
                 iterator.remove();  // go ahead and remove this list's link to the FPlayer object
-                fplayer.remove();
+                if(Conf.autoLeaveDeleteFPlayerData) {
+                    fplayer.remove();
+                }
             }
         }