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.cpp

@@ -0,0 +1,62 @@
+#include "Arduino.h"
+#include "PushButton.h"
+
+#define DEBOUNCE 20  // button debouncer, how many ms to debounce, 5+ ms is usually plenty
+
+PushButton::PushButton(int pin)
+{
+  _pin = pin;
+  _pressed = 0;
+  justpressed = 0;
+  justreleased = 0;
+  previousstate = 0;
+  currentstate = 0;
+  lasttime = millis();
+  pinMode(_pin, INPUT);
+}
+
+void PushButton::update()
+{
+  justreleased = 0;
+  justpressed = 0; 
+  
+  if ((lasttime + DEBOUNCE) > millis()) {
+    // not enough time has passed to debounce
+    return; 
+  }
+  // ok we have waited DEBOUNCE milliseconds, lets reset the timer
+  lasttime = millis();
+  
+  currentstate = digitalRead(_pin);   // read the button
+    
+    if (currentstate == previousstate) {
+      if ((_pressed == LOW) && (currentstate == LOW)) {
+          // just pressed
+          justpressed = 1;
+      }
+      else if ((_pressed == HIGH) && (currentstate == HIGH)) {
+          // just released
+          justreleased = 1;
+      }
+      _pressed = !currentstate;  // remember, digital HIGH means NOT pressed
+    }
+    //Serial.println(pressed[index], DEC);
+    previousstate = currentstate;   // keep a running tally of the buttons
+}
+
+
+boolean PushButton::isDown()
+{
+  return _pressed;
+}
+
+boolean PushButton::pressed()
+{
+  return justpressed;
+}
+
+boolean PushButton::released()
+{
+  return justreleased;
+}
+

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