Implemented command line config overrides

You can set the file to read as the config file via the command line, like
this, assuming the program supports it:

  prog -config=file.cfg

You can also override indevidual key-value pairs in the config system
using this syntax:

  prog -Ckey=value

Both commands can be used together, and you can override multiple
key-value pairs at once. To use this feature of the ConfigUtility, it must
receive argc and argv as parameters to the Load() method.

client/client_application.cpp

@@ -45,12 +45,12 @@
 //Public access members
 //-------------------------
 
-void ClientApplication::Init(int argc, char** argv) {
+void ClientApplication::Init(int argc, char* argv[]) {
 	std::cout << "Beginning " << argv[0] << std::endl;
 
 	//load the prerequisites
 	ConfigUtility& config = ConfigUtility::GetSingleton();
-	config.Load("rsc\\config.cfg");
+	config.Load("rsc\\config.cfg", argc, argv);
 
 	//-------------------------
 	//Initialize the APIs