Create README.md

README.md

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+This is the Arduino AccelStepper library. It provides an object-oriented interface for 2, 3 or 4 pin stepper motors and motor drivers.
+
+The standard Arduino IDE includes the Stepper library (http://arduino.cc/en/Reference/Stepper) for stepper motors. It is perfectly adequate for simple, single motor applications.
+
+AccelStepper significantly improves on the standard Arduino Stepper library in several ways:
+
+    Supports acceleration and deceleration
+    Supports multiple simultaneous steppers, with independent concurrent stepping on each stepper
+    API functions never delay() or block
+    Supports 2, 3 and 4 wire steppers, plus 3 and 4 wire half steppers.
+    Supports alternate stepping functions to enable support of AFMotor (https://github.com/adafruit/Adafruit-Motor-Shield-library)
+    Supports stepper drivers such as the Sparkfun EasyDriver (based on 3967 driver chip)
+    Very slow speeds are supported
+    Extensive API
+    Subclass support