Pedro Silva 0192ffe5a5 Add new API method: `getFeedStats'
`getFeedStats' calls the new static function `api_get_feed_stats' to
return an array of real feeds of the following form:

    [{
       "first" : 1127,
       "unread" : 873,
       "last" : 15460,
       "title" : "Some feed",
       "id" : 31,
       "total" : 1513
    }]

where "first", "last", "total" are the first, last and total number of
articles in the feed.

This adds the ability to nntp-oriented clients to efficiently retrieve
an "active file" without having to resort to `getHeadlines(limit=-1)'
2013-04-11 16:25:37 +01:00
..
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