Changes for clojure.contrib.generic.collection/into

john.r.woodward on Mon, 23 Jul 2012
(into [5 6 7 8] '(1 2 3 4))
==> [5 6 7 8 1 2 3 4]        
(into #{5 6 7 8} [1 2 3 4])
==> #{1 2 3 4 5 6 7 8}       
(into [[5 6] [7 8]] #{[1 2] [3 4]})
==> [[5 6] [7 8] [3 4] [1 2]]  
(into #{{5 6} {7 8}} [{1 2} {3 4}])
 ==> #{{5 6} {1 2} {3 4} {7 8}}