list available templates using "template" alias

src/dumm/ext/lib/dumm.rb

@@ -30,8 +30,12 @@ module Dumm
   end
   
   # shortcut for Template loading
-  def template(name)
+  def template(name = nil)
+    if name
       Template.load name
+    else
+      Template.each {|t| puts t }
+    end
   end
   
   # unload templates, reset all guests and delete bridges