Updating tickets (#1190, #1322, #1375, #1406, #1408, #950, #1162, #1166, #1236, #1255, #1310, #1423, #1428, #1468, #1476, #1477, #1478, #1509, #1511, #1519, #1534, #1537, #1538, #1542, #1549, #1557, #1037, #1085, #1173, #1231, #1364, #1485, #1525, #1526, #1527, #1528, #1553, #1348, #1403)

Solved with dynamically resizable routers, #1557.

Add and remove can be done with custom Resizer, if not the DefaultResizer is good enough.

Routees can also removed by stopping them.

Let me know if there was some other intention with this ticket.