Rename getDir to promptDirection; rotate TODO (step 5 done)

game/misc.go

@@ -406,9 +406,9 @@ func (g *RogueGame) isCurrent(obj *Object) bool {
 	return false
 }
 
-// getDir sets up the direction coordinate for use in various "prefix"
-// commands (misc.c get_dir).
-func (g *RogueGame) getDir() bool {
+// promptDirection sets up the direction coordinate for use in various
+// "prefix" commands (misc.c get_dir).
+func (g *RogueGame) promptDirection() bool {
 	if g.Again && g.LastDir != 0 {
 		g.Delta = g.lastDelt
 		g.DirCh = g.LastDir