remove module monkey-patching; add Builder#name()

spec/rscons/monkey/module_spec.rb

@@ -1,6 +0,0 @@
-describe "Module#short_name" do
-  it "returns the inner name of the module" do
-    Rscons::Environment.short_name.should == "Environment"
-    Rscons::Object.short_name.should == "Object"
-  end
-end