Major IDF and Arduino Update

WiFi and BlueTooth can now be started and stopped at will.
basic functions added to esp32-hal to start and stop the BT radio
SimpleBLE class added to show the most basic functionality
Example to show how to switch between BT, WiFi or Both

libraries/SimpleBLE/src/SimpleBLE.h

@@ -0,0 +1,63 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef _SIMPLE_BLE_H_
+#define _SIMPLE_BLE_H_
+
+
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "bt.h"
+
+#include "Arduino.h"
+
+struct ble_gap_adv_params_s;
+
+class SimpleBLE {
+    public:
+
+        SimpleBLE(void);
+        ~SimpleBLE(void);
+
+        /**
+         * Start BLE Advertising
+         *
+         * @param[in] localName  local name to advertise
+         *
+         * @return true on success
+         *
+         */
+        bool begin(String localName=String());
+
+        /**
+         * Stop BLE Advertising
+         *
+         * @return none
+         */
+        void end(void);
+
+    private:
+        struct ble_gap_adv_params_s * _ble_adv_param;
+        String local_name;
+        void _ble_send_adv_param(void);
+        void _ble_send_adv_data(void);
+    private:
+
+};
+
+#endif