Rename SubscriptionManager to PriceSubscriptionManager;

RENAMED: SubscriptionManager.cs -> PriceSubscriptionManager.cs

CHANGED: MarketManager.cs; AsyncHttpHandlerPrices.cs
-- Comply with class name change when calling fns

CHANGED: Global.asax
-- Comply with class name change when calling Stop()

CHANGED: appSettingsOrders.web.config
-- Added Tag39 to config for clarity
Merge pull request #18 from Hiblet/12MAR2014

Rename SubscriptionManager to PriceSubscriptionManager;