Basic support for GPIOs 0-15.

Start new 'core' component for low-level parts

Progress towards #8

core/include/esp8266.h

@@ -0,0 +1,19 @@
+/* esp8266.h
+ *
+ * ESP-specific SoC-level addresses, macros, etc.
+ *
+ * Part of esp-open-rtos
+ * Copyright (C) 2015 Superhouse Automation Pty Ltd
+ * BSD Licensed as described in the file LICENSE
+ */
+#include <stdint.h>
+
+#ifndef _ESP8266_H
+#define _ESP8266_H
+
+#include "common_macros.h"
+#include "esp/registers.h"
+#include "esp/iomux.h"
+#include "esp/gpio.h"
+
+#endif