minor changes, added ALL required externals

user/ESP8266lib/ESP.h

@@ -0,0 +1,16 @@
+#ifndef ESP_H
+#define ESP_H
+
+class ESP {
+
+public:
+
+	static inline uint32_t getCycleCount() {
+		uint32_t ccount;
+		__asm__ __volatile__("esync; rsr %0,ccount":"=a" (ccount));
+		return ccount;
+	}
+
+};
+
+#endif // ESP_H