add st alias for status

lib/svi/cli.rb

@@ -5,6 +5,7 @@ module Svi
 
     ALIASES = {
       "co" => "checkout",
+      "st" => "status",
     }
 
     HELP_TEXT = <<EOS
@@ -15,6 +16,7 @@ Global options:
 
 Commands:
   checkout/co     check out Subversion URL
+  status/st       show Subversion status
 EOS
 
     def initialize