Hello World program for NNN50_WIFI_API library

Dependencies:   NNN50_WIFI_API

This is a must try example for basic WIFI functions using DELTA DFCM-NNN50 platform. In order to test with this example, user first need to open UDP Server port (use 1030 in this example) on a PC or mobile with Socket test tool (download UDP Test Tool' for PC, and Socket X for iOS or anymore socket test tool program available) When this example is running, the module will connect to a pre-defined AP router and run as UDP Client. For more information on the usage of regular TCP and UDP Sockets, the mbed handbook can be found here

Revision:
4:11b81280c65b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json	Mon Apr 17 14:19:36 2017 +0000
@@ -0,0 +1,17 @@
+{
+    "config": {
+        "lf_clock_rc_calib_timer_interval": {
+            "value": 16,
+            "macro_name": "MBED_CONF_NORDIC_NRF_LF_CLOCK_CALIB_TIMER_INTERVAL"
+        },
+        "lf_clock_rc_calib_mode_config": {
+            "value": 0,
+            "macro_name": "MBED_CONF_NORDIC_NRF_LF_CLOCK_CALIB_MODE_CONFIG"
+        },
+        "uart_hwfc": {
+            "help": "Value: 1 for enable, 0 for disable",
+            "value": 0,
+            "macro_name": "MBED_CONF_NORDIC_UART_HWFC"
+        }        
+    }
+}
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