small help tweaks, sync with README

README.md

@@ -28,13 +28,16 @@ Install an app:
 ### Commands
 
 	update                Update the index
-	search <regexp...>    Search available apps
+	search [<regexp...>]  Search available apps
 	show <appid...>       Show detailed info about an app
-	devices               List connected devices
+	install <appid...>    Install or upgrade apps
-	download <appid...>   Download an app
-	install <appid...>    Install or upgrade app
 	uninstall <appid...>  Uninstall an app
+	download <appid...>   Download an app
+	devices               List connected devices
+	list (categories)     List all known values of a kind
 	defaults              Reset to the default settings
+	version               Print version information
+
 
 An appid is just an app's unique package name. A specific version of an app can
 be selected by following the appid with a colon and the version code. The

install.go

@@ -13,7 +13,7 @@ import (
 
 var cmdInstall = &Command{
 	UsageLine: "install <appid...>",
-	Short:     "Install or upgrade an app",
+	Short:     "Install or upgrade apps",
 }
 
 var (

show.go

@@ -14,7 +14,7 @@ import (
 
 var cmdShow = &Command{
 	UsageLine: "show <appid...>",
-	Short:     "Show detailed info about an app",
+	Short:     "Show detailed info about apps",
 }
 
 func init() {