let PI try to enable sensorTag access on install

hardware/sensorTag/package.json

@@ -1,7 +1,7 @@
 {
     "name": "node-red-node-sensortag",
     "description": "A Node-RED node to read data from a TI SensorTag",
-    "version": "0.0.14",
+    "version": "0.0.15",
     "keywords": [
         "node-red",
         "sensortag",
@@ -11,6 +11,9 @@
     "dependencies": {
         "sensortag": "~1.2.0"
     },
+    "scripts" : {
+        "postinstall" : "scripts/pibt.sh"
+    },
     "license": "Apache-2.0",
     "repository": {
         "type": "git",

hardware/sensorTag/scripts/pibt.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+if grep -q ARM /proc/cpuinfo
+then
+    sudo apt-get install libbluetooth-dev libudev-dev pi-bluetooth
+    sudo setcap cap_net_raw+eip $(eval readlink -f `which node`)
+fi