added context to enumerable

lib/draper/decorated_enumerable_proxy.rb

@@ -38,6 +38,10 @@ module Draper
     def to_s
       "#<DecoratedEnumerableProxy of #{@klass} for #{@wrapped_collection.inspect}>"
     end
+    
+    def context=(input)
+      self.map { |member| member.context = input }
+    end
 
     def source
       @wrapped_collection

spec/draper/base_spec.rb

@@ -313,6 +313,11 @@ describe Draper::Base do
         it "returns a collection of wrapped objects" do
           subject.each{ |decorated| decorated.should be_instance_of(Draper::Base) }
         end
+
+        it 'should accepted and store a context for a collection' do
+          subject.context = :admin
+          subject.each { |decorated| decorated.context.should == :admin }
+        end
       end
 
       context "when given a single source object" do