'De-serialize from Mongo-storable format to an object.'

def from_storable(self, edit_info):

    self.previous_version = edit_info.get('previous_version', None)
    self.update_version = edit_info.get('update_version', None)
    self.source_version = edit_info.get('source_version', None)
    self.edited_on = edit_info.get('edited_on', None)
    self.edited_by = edit_info.get('edited_by', None)
    self.original_usage = edit_info.get('original_usage', None)
    self.original_usage_version = edit_info.get('original_usage_version', None)
