Merge pull request #346 from codegangsta/category_sort_2

Add option to make categories with command, to display a more structured help

help.go

@@ -23,9 +23,10 @@ VERSION:
 AUTHOR(S):
    {{range .Authors}}{{ . }}{{end}}
    {{end}}{{if .Commands}}
-COMMANDS:
-   {{range .Commands}}{{join .Names ", "}}{{ "\t" }}{{.Usage}}
-   {{end}}{{end}}{{if .Flags}}
+COMMANDS:{{range .Categories}}{{if .Name}}
+  {{.Name}}{{ ":" }}{{end}}{{range .Commands}}
+    {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
+{{end}}{{end}}{{if .Flags}}
 GLOBAL OPTIONS:
    {{range .Flags}}{{.}}
    {{end}}{{end}}{{if .Copyright }}
@@ -41,7 +42,10 @@ var CommandHelpTemplate = `NAME:
    {{.HelpName}} - {{.Usage}}
 
 USAGE:
-   {{.HelpName}}{{if .Flags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{if .Description}}
+   {{.HelpName}}{{if .Flags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{if .Category}}
+
+CATEGORY:
+   {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
    {{.Description}}{{end}}{{if .Flags}}
@@ -60,9 +64,10 @@ var SubcommandHelpTemplate = `NAME:
 USAGE:
    {{.HelpName}} command{{if .Flags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
 
-COMMANDS:
-   {{range .Commands}}{{join .Names ", "}}{{ "\t" }}{{.Usage}}
-   {{end}}{{if .Flags}}
+COMMANDS:{{range .Categories}}{{if .Name}}
+  {{.Name}}{{ ":" }}{{end}}{{range .Commands}}
+    {{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
+{{end}}{{if .Flags}}
 OPTIONS:
    {{range .Flags}}{{.}}
    {{end}}{{end}}