Fixed last_modified error. By default, Resource alaways return None for last_modified field.
Fixed last_modified error. By default, Resource alaways return None for last_modified field.

mkorenkov/dj-webmachine,benoitc/dj-webmachine,mkorenkov/dj-webmachine,mkorenkov/dj-webmachine,benoitc/dj-webmachine,benoitc/dj-webmachine