Websocket client cellular hello world example

Dependencies:   C027_Support WebSocketClient mbed

Fork of Websocket_Ethernet_HelloWorld by Mbed

--- a/main.cpp	Tue May 27 09:20:05 2014 +0000
+++ b/main.cpp	Fri Jun 06 15:16:19 2014 +0000
@@ -11,7 +11,7 @@
 /*! The APN of your network operator SIM, sometimes it is "internet" check your 
     contract with the network operator. You can also try to look-up your settings in 
     google: https://www.google.de/search?q=APN+list */
-#define APN         "gprs.swisscom.ch"
+#define APN         NULL
 //! Set the user name for your APN, or NULL if not needed
 #define USERNAME    NULL
 //! Set the password for your APN, or NULL if not needed