Add tasks for all the new languages

Task/Priority-queue/FunL/priority-queue.funl

@@ -0,0 +1,22 @@
+import util.ordering
+native scala.collection.mutable.PriorityQueue
+
+data Task( priority, description )
+
+def comparator( Task(a, _), Task(b, _) )
+  | a > b     = -1
+  | a < b     =  1
+  | otherwise =  0
+
+q = PriorityQueue( ordering(comparator) )
+
+q.enqueue(
+  Task(3, 'Clear drains'),
+  Task(4, 'Feed cat'),
+  Task(5, 'Make tea'),
+  Task(1, 'Solve RC tasks'),
+  Task(2, 'Tax return')
+  )
+
+while not q.isEmpty()
+  println( q.dequeue() )