[rackspace|storage] Add copy_object request.

lib/fog/rackspace/requests/storage/copy_object.rb

@@ -0,0 +1,27 @@
+module Fog
+  module Storage
+    class Rackspace
+      class Real
+
+        # Copy object
+        #
+        # ==== Parameters
+        # * source_container_name<~String> - Name of source bucket
+        # * source_object_name<~String> - Name of source object
+        # * target_container_name<~String> - Name of bucket to create copy in
+        # * target_object_name<~String> - Name for new copy of object
+        # * options<~Hash> - Additional headers
+        def copy_object(source_container_name, source_object_name, target_container_name, target_object_name, options={})
+          headers = { 'X-Copy-From' => "/#{source_container_name}/#{source_object_name}" }.merge(options)
+          request({
+            :expects  => 201,
+            :headers  => headers,
+            :method   => 'PUT',
+            :path     => "#{Fog::Rackspace.escape(target_container_name)}/#{Fog::Rackspace.escape(target_object_name)}"
+          })
+        end
+
+      end
+    end
+  end
+end

lib/fog/rackspace/storage.rb

@@ -15,6 +15,7 @@ module Fog
       collection  :files
 
       request_path 'fog/rackspace/requests/storage'
+      request :copy_object
       request :delete_container
       request :delete_object
       request :get_container