Patch 1

This uses ElmahSignal's Raise capability to wire the Logger's Error and Fatal methods to the ErrorLogModule rather than directly to the registered Elmah ErrorLog.  This allows additional Elmah modules such as ErrorPost (with ElmahR) and ErrorMail to push notifications of logged errors since they listen to ErrorLogModule's Logged event.  It does require the HttpApplication to be passed into the constructor of the ElmahLogFactory to take advantage of this capability.