win32tty changes

1. Switch to low-level console routines for performance improvements.
2. Instead of moving the cursor around like a real tty, just track the
   destination coordinates of where the cursor should be, and
   defer the movement until user input is expected.

Credit to <Someone> for #2.

sys/share/pcmain.c

@@ -275,19 +275,8 @@ char *argv[];
 # endif
 #endif
 
-	if (!*plname) {
-#ifdef WIN32CON
-		boolean revert = FALSE;
-		if (!iflags.rawio) {
-			set_output_mode(1);
-			revert = TRUE;
-		}
-#endif
+	if (!*plname)
 		askname();
-#ifdef WIN32CON
-		if (revert && iflags.rawio) set_output_mode(0);
-#endif
-	}
 	plnamesuffix(); 	/* strip suffix from name; calls askname() */
 				/* again if suffix was whole name */
 				/* accepts any suffix */