Make Twitter::Base#[] behave more like a hash

Hat-tip: @laserlemon

lib/twitter/base.rb

@@ -32,6 +32,8 @@ def initialize(attrs={})
     # @param method [String, Symbol] Message to send to the object
     def [](method)
       self.__send__(method.to_sym)
+    rescue NoMethodError
+      nil
     end
 
   end

spec/twitter/base_spec.rb

@@ -13,6 +13,10 @@
     it "should be able to call methods using [] with string" do
       @base['object_id'].should be_an Integer
     end
+    it "should return nil for missing method" do
+      @base[:foo].should be_nil
+      @base['foo'].should be_nil
+    end
   end
 
   describe "#to_hash" do