start on jtk module

Rsconsfile

@@ -2,5 +2,6 @@ Rscons::Environment.new do |env|
   env["sources"] = Dir[
     "src/**/*.d", 
     "src/**/*.c"]
+  env["D_IMPORT_PATH"] += Dir["src/**/"]
   env.Program("#{env.build_root}/jes", "${sources}")
 end