Init commit with many years of arduino sketches and projects. I dont know if the esp8266 includes much, but there are also libraries. I hope they dont have crazy automatic versioning through the Arduino IDE.

Projects/libraries/plab-library-master/PushButton.h

@@ -0,0 +1,31 @@
+/*
+  PushButton.h - Library for Button with cebounce.
+  Created by Dag Svanæs, 2015.
+  Released into the public domain.
+*/
+
+#ifndef PushButton_h
+#define PushButton_h
+
+#include "Arduino.h"
+
+
+#define DEBOUNCE 20  // button debouncer, how many ms to debounce, 5+ ms is usually plenty
+
+class PushButton
+{
+  public:
+    PushButton(int pin);
+    void update();
+    boolean isDown();
+    boolean pressed(); 
+    boolean released();     
+  private:
+    int _pin;
+    byte _pressed, justpressed, justreleased;
+    byte previousstate;
+    byte currentstate;
+    long lasttime;
+};
+
+#endif