'Retrieve stories from a collection of feeds. This is known as the River of News.
Stories are ordered in reverse chronological order.
`read_stories_count` is the number of stories that have been read in this
continuation, so NewsBlur can efficiently skip those stories when retrieving
new stories. Takes an array of feed ids.'

@request('reader/river_stories')
def river_stories(self, feeds, page=1, read_stories_count=0):

    data = [('page', page), ('read_stories_count', read_stories_count)]
    for feed in feeds:
        data.append(('feeds', feed))
    return data
