add some message and remove fields

those fields are already present in the classes
(in the future they should be defined in some and integrated to ruby,
but that would mean parsing to boot and parsing doesn’t yet work on
opal)

lib/soml/compiler.rb

@@ -141,7 +141,7 @@ module Soml
     end
 
     def self.load_parfait
-      ["word","class","layout","object"].each do |o|
+      ["word","class","layout","message" , "object"].each do |o|
         str = File.open(File.expand_path("parfait/#{o}.soml", File.dirname(__FILE__))).read
         syntax  = Parser::Salama.new.parse_with_debug(str)
         parts = Parser::Transform.new.apply(syntax)