routing: Move tools inside lnd. Refactor and delete unneeded stuff

Use [33]byte for graph vertex representation.
Delete unneeded stuff:
1. DeepEqual for graph comparison
2. EdgePath
3. 2-thread BFS
4. Table transfer messages and neighborhood radius
5. Beacons

Refactor:
1. Change ID to Vertex
2. Test use table driven approach
3. Add comments
4. Make graph internal representation private
5. Use wire.OutPoint as  EdgeId
6. Decouple routing messages from routing implementation
7. Delete Async methods
8. Delete unneeded channels and priority buffer from manager
9. Delete unneeded interfaces in internal graph realisation
10. Renamed ID to Vertex

lnwire/message.go

@@ -114,10 +114,6 @@ func makeEmptyMessage(command uint32) (Message, error) {
 		msg = &NeighborAckMessage{}
 	case CmdNeighborRstMessage:
 		msg = &NeighborRstMessage{}
-	case CmdRoutingTableRequestMessage:
-		msg = &RoutingTableRequestMessage{}
-	case CmdRoutingTableTransferMessage:
-		msg = &RoutingTableTransferMessage{}
 	case CmdPing:
 		msg = &Ping{}
 	case CmdPong: