timestamps.rb in ripple-0.9.2

- old
+ new

@@ -9,10 +9,11 @@
 #    Unless required by applicable law or agreed to in writing, software
 #    distributed under the License is distributed on an "AS IS" BASIS,
 #    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
-require 'ripple'
+require 'active_support/time'
+require 'active_support/concern'
 
 module Ripple
   # Adds automatic creation and update timestamps to a
   # {Ripple::Document} model.
   module Timestamps