Checking in a minimal active_model shim, but it's a bigger job than j…

…ust this, so checking this in and tabling it

lib/gorillib/receiver/active_model_shim.rb

@@ -0,0 +1,19 @@
+require 'active_model'
+
+module Receiver
+  class ActiveModelShim
+    extend ActiveModel::Naming
+
+    def to_model
+      self
+    end
+
+    def valid?()      true  end
+    def new_record?() true  end
+    def destroyed?()  false end
+
+    def errors
+      @_errors ||= ActiveModel::Errors.new(self)
+    end
+  end
+end