Fixed market prices showing; Fixed PositionLimit default state bug;

FIXED: PositionLimit.cs
-- Restricted state flag was not part of deep copy ctor, now is.
   This manifested as odd restricted state change when creating new PL.

FIXED: OrderContainers.cs
-- Market price was showing; Code now hops over market prices.

CHANGED: PositionLimitManager.cs
-- Logging increased to help debug PositionLimit bug.

CHANGED: OrderQInDAL.cs
-- TransactionTime updated when order is popped from the queue.

CHANGED: Market.cs
-- TransactionTime updated when ExchID assigned to New/Replace types.
-- OrderHistory now not updated when order is completed and removed.

CHANGED: Order.cs
-- Username forced to lower case on adding to class.

CHANGED: Trading.aspx
-- ClearFormOnSend checkbox now defaults to unchecked.

CHANGED: web.config
-- Unicode prefix N now used in both systems (no differences).