Keyboard hook fixes, added targetRefresh command

Keyboard hook class now only listens for Hot Keys and not a all keys in
a global keyboard hook.  This should fix the reliability of the keyboard
hook.
Added a new command targetRefresh which will allow you to refresh the
XML on a specified window and not the entire desktop.  This will help if
you want to speed up the synthuse script by not continuously doing full
refreshes of the xml.

src/org/synthuse/commands/MainCommands.java

@@ -64,6 +64,13 @@ public class MainCommands extends BaseCommand {
 		return true;
 	}
 	
+	public boolean cmdTargetRefresh(String[] args) {
+		if (!checkArgumentLength(args, 1))
+			return false;
+		targetXmlRefresh(args[0]);
+		return true;
+	}
+	
 	public boolean cmdWaitForTitle(String[] args) {
 		if (!checkArgumentLength(args, 1))
 			return false;