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+Sprite
+======
+
+Sprite is a JavaScript sprite sheet animation library. It uses `background-position` for animating the sprite sheet and where possible `requestAnimationFrame`, falling back to `setInterval`.
+
+## Methods
+
+### Sprite(el, frames [, options])
+Sprite's constructor method.
+
+```javascript
+var foo = new Sprite(...);
+```
+
+#### Arguments:
+
+- `el` (DOM Element) - The element that will be animating
+
+```javascript
+var foo = new Sprite(document.getElementById('sprite'));
+```
+
+- `frames` (Array||Object) - There are multiple ways to define frames, inspired by EaselJS.
+
+**Object**
+Using an object is a simple method for inline sprite sheets.
+
+```javascript
+var foo = new Sprite(..., {width: 20, height: 20, length: 4});
+```
+
+- `width` (Number) - The width of the sprite
+- `height` (Number) - The height of the sprite
+- `length` (Number) - How many sprites there are
+
+Alternatively, allow Sprite to calculate the length by passing the `imageWidth` and `imageHeight` as options.
+
+```javascript
+var foo = new Sprite(..., {width: 20, height: 20}, {imageWidth: 40, imageHeight: 40});
+```
+
+- `options` (Object) - An object to set the default options for this instance.
+
+Along with the standard options these are available
+
+- `imageWidth` (Number) - The width of the image. Needed when length isn't set
+- `imageHeight` (Number) - The height of the image. Needed when length isn't set
+
+**Array**
+The array definition is useful for more complex sprite sheets with multiple lines and stacked frames.
+This definition is an Array of Arrays with the following make-up [x, y, width, height]
+
+```javascript
+var frames = [[0, 0, 20, 20], [20, 0, 20, 20], [0, 20, 20, 20], [20, 20, 20, 20]];
+var foo = new Sprite(..., frames);
+```
+
+### play([options])
+Starts the animation.
+
+- `options` (Object) - Override any of the options set previously. See Options.
+
+```javascript
+var foo = new Sprite(..., ..., {fps: 12, reverse: true});
+// Change my mind, play at 24 fps and forwards
+foo.play({fps: 24, reverse: false, onComplete: fooCompleteHandler});
+```
+### stop([frame] [, animated] [, callback])
+Stops the animation, optionally on a specific frame.
+
+- `frame` (Number) - Frame number to stop on
+- `animated` (Boolean) - If stopping should be animated
+- `callback` (Function) - Called on completion of an animated `stop`
+
+### frame([value])
+Getter/Setter for frame.
+
+- `value` (Number) - Which frame to go to
+
+### isPlaying()
+Returns true if the Sprite is animating
+
+## Options
+Options can be set when instantiating Sprite or overridden when using the `play` method. Defaults can be changed using `Sprite.defaults`.
+
+- `fps` (Number) - Frames per second. Default: 12.
+- `loop` (Boolean||Number) - Boolean or a Number for how many times to loop. Default: true.
+- `reverse` (Boolean) - If the animation plays in reverse. Default: false.
+- `from` (Number) - Frame number to start from.
+- `onFrame` (Function(currentFrame, numLoops)) - Callback on each frame.
+- `onComplete` (Function) - Callback once the animation is complete.
+
+## Notes
+Sprite includes [requestAnimationFrame polyfill](https://gist.github.com/paulirish/1579671) globally.
+
+Tested in the following browsers
+
+- IE 7 - 10
+- Chrome
+- Firefox
+- Safari
+- Opera
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