Function to get newsfeed for a pipeline
		Args:
			box 			pipeline key
			detail_level 	arguments for req str ['ALL', 'CONDENSED']
			return 			list of feed dicts parse at your convenience

def get_box_newsfeeds(self, box_key, detail_level = None):
		'''Function to get newsfeed for a pipeline
		Args:
			box 			pipeline key
			detail_level 	arguments for req str ['ALL', 'CONDENSED']
			return 			list of feed dicts parse at your convenience
		'''
		uri = '/'.join([
						self.api_uri,
						self.boxes_suffix,
						box_key,
						self.newsfeed_suffix
						])
		return self._get_newsfeeds(uri, detail_level)