2016-02-16: remove limitation to 10 known IDs

remove limitation to 10 known IDs

diff --git a/crawl-wot.scm b/crawl-wot.scm
--- a/crawl-wot.scm
+++ b/crawl-wot.scm
@@ -142,7 +142,7 @@
               (set! known (lset-union equal?
                                       (list-ec (: u new) (wot-uri-key u))
                                       known))
-              (if (or (null? new) (> (length known) 10))
+              (if (null? new)
                   known
                   (lset-union equal? known (map crawl new)))))))))