Write a proximity-aware Mbed-based LED scanner!

Revision:
1:9bb81732ca15
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json	Thu Nov 29 18:50:07 2018 +0000
@@ -0,0 +1,16 @@
+{
+    "target_overrides": {
+        "K64F": {
+            "target.features_add": ["BLE"],
+            "target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+        },
+        "NUCLEO_F401RE": {
+            "target.features_add": ["BLE"],
+            "target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+        },
+        "DISCO_L475VG_IOT01A": {
+            "target.features_add": ["BLE"],
+            "target.extra_labels_add": ["CORDIO", "CORDIO_BLUENRG"]
+        }
+    }
+}