Rename constructor to game.New(game.Params) per styleguide

NewGame(Config) becomes New(Params), and Restore takes Params too, so
the package's primary type gets the canonical New() constructor with a
named-field Params struct (styleguide points 139, 159). cmd/rogue and
all tests updated; ARCHITECTURE.md constructor references corrected.
Pure rename, suite green.

cmd/rogue/main.go

@@ -29,10 +29,10 @@ func run() int {
 
 	flag.Parse()
 
-	cfg := loadConfig()
+	params := loadParams()
 
 	if *scores {
-		game.NewGame(cfg).ShowScores()
+		game.New(params).ShowScores()
 
 		return 0
 	}
@@ -45,13 +45,13 @@ func run() int {
 	}
 	defer t.Fini()
 
-	cfg.Term = t
+	params.Term = t
 
 	var g *game.RogueGame
 
 	if args := flag.Args(); len(args) == 1 && !*deathDemo {
 		// restore a saved game
-		g, err = game.Restore(args[0], cfg)
+		g, err = game.Restore(args[0], params)
 		if err != nil {
 			t.Fini()
 			fmt.Fprintln(os.Stderr, err)
@@ -59,7 +59,7 @@ func run() int {
 			return 1
 		}
 	} else {
-		g = game.NewGame(cfg)
+		g = game.New(params)
 	}
 
 	if *deathDemo {
@@ -81,10 +81,10 @@ func run() int {
 	return 0
 }
 
-// loadConfig gathers the game configuration from the environment: home
+// loadParams gathers the game parameters from the environment: home
 // directory, ROGUEOPTS, user name, wizard mode, and the dungeon seed
 // (main.c's startup).
-func loadConfig() game.Config {
+func loadParams() game.Params {
 	home, _ := os.UserHomeDir()
 
 	name := ""
@@ -96,7 +96,7 @@ func loadConfig() game.Config {
 
 	wizard := os.Getenv("ROGUE_WIZARD") != ""
 
-	return game.Config{
+	return game.Params{
 		Seed:      chooseSeed(wizard),
 		Name:      name,
 		RogueOpts: os.Getenv("ROGUEOPTS"),