0.0.19 fix rather obv #nominate issue

closes #1

yeah maybe i'm not cut out for metaprogramming :/

lib/dogviz/nominator.rb

@@ -2,7 +2,7 @@ module Dogviz
   module Nominator
     def nominate(names_to_nominees)
       names_to_nominees.each { |name, nominee|
-        self.class.send(:define_method, name) do
+        define_singleton_method name do
           nominee
         end
       }

lib/dogviz/version.rb

@@ -1,3 +1,3 @@
 module Dogviz
-  VERSION = '0.0.18'
+  VERSION = '0.0.19'
 end

tests/test_dogviz_graph.rb

@@ -115,18 +115,38 @@ def test_find_all
   end
 
   class Dog
+    def initialize(name)
+      @name = name.to_s
+    end
+    def inspect
+      "dog #{@name}"
+    end
   end
   def test_nominate_elevates_values_as_method_on_group
     group = sys.group('g')
 
-    dog = Dog.new
+    dog = Dog.new 'a'
 
     group.nominate foobar: :any_value, dog: dog
 
     assert_equal :any_value, group.foobar
     assert_equal dog, group.dog
   end
 
+  def test_nominates_with_same_name_on_different_containers_work_together
+    group1 = sys.group('g1')
+    group2 = sys.group('g2')
+
+    dog1 = Dog.new 1
+    dog2 = Dog.new 2
+
+    group1.nominate dog: dog1
+    group2.nominate dog: dog2
+
+    assert_equal dog1, group1.dog
+    assert_equal dog2, group2.dog
+  end
+
   def test_nominate_from_delegates_multiple_accessors
     outer = sys.group('outer')
     nested = outer.group('nested')