added simple_client (and added it in the docs as well).

updated documentation to include some sample code.
fixed a nasty network bug.
It now seems to work on linux (at least in cygwin).

examples/client_test.cpp

@@ -123,12 +123,12 @@ bool sleep_and_input(char* c)
 
 void set_cursor(int x, int y)
 {
-//	std::cout << "\033[" << y << ";" << x << "H";
+	std::cout << "\033[" << y << ";" << x << "H";
 }
 
 void clear()
 {
-//	std::cout << "\033[2J";
+	std::cout << "\033[2J";
 }
 
 #endif