Merge pull request #190 from mumoshu/fix-helmfile.d-defaulting

fix: `helmfile sync` doesn't recognize the default `helmfile.d/` directory

main.go

@@ -60,8 +60,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:  "file, f",
-			Value: DefaultHelmfile,
-			Usage: "load config from `FILE`",
+			Usage: "load config from file or directory. defaults to `helmfile.yaml` or `helmfile.d`(means `helmfile.d/*.yaml`) in this preference",
 		},
 		cli.BoolFlag{
 			Name:  "quiet, q",