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/main.cpp

@@ -30,7 +30,7 @@
 
 using namespace std;
 
-int main(int argc, char** argv) {
+int main(int argc, char* argv[]) {
 	try {
 		//create the singletons
 		ConfigUtility::Create();