Update README to document Easing usage.

This also changes layout to more readable format.

Author: jozan

README.md

@@ -82,33 +82,17 @@ AppRegistry.registerComponent('rnsandbox', () => rnsandbox);
 
 ## Properties
 
-#### `progress`
-
-The progress value for the progress bar. Ranges from `0..1`.
-
-#### `easing`
-
-The easing function which is applied to the animation. Can be custom or one of the functions on the `ProgressBar.easingTypes` object.
-
-#### `easingDuration`
-
-The time taken to complete the animation.
-
-#### `fillStyle`
-
-The style for the progress bar fill.
-
-#### `backgroundStyle`
-
-The style for the progress bar's background.
-
-#### `style`
-
-The style for the entire component. This doesn't really differ from the `backgroundStyle` property. You must set `width` either here or in `backgroundStyle` in order to make sure the component works properly.
+| Prop | Description | Default |
+|---|---|---|
+|**`progress`**|The progress value for the progress bar. Ranges from `0..1`.|None|
+|**`easingDuration`**|The time taken to complete the animation in milliseconds.|`500`|
+|**`easing`**|Function from [`Easing`](https://github.com/facebook/react-native/blob/master/Libraries/Animation/Animated/Easing.js).|`Easing.inOut(Easing.ease)`|
+|**`fillStyle`**|The style for the progress bar fill.|None|
+|**`backgroundStyle `**|The style for the progress bar's background.|None|
+|**`style `**|The style for the entire component. This doesn't really differ from the `backgroundStyle` property. You must set width either here or in `backgroundStyle` in order to make sure the component works properly.|See [`ProgressBar.js`](https://github.com/lwansbrough/react-native-progress-bar/blob/master/ProgressBar.js)|
 
 
 ## Component methods
-
-#### `update(progress)`
-
-The recommended way to update the progress of the progress bar is to use the `progress` property. If you prefer, you can use this `update` method to update the progress directly. To access this method, set the `ref` property on the `<ProgressBar>` and call `this.refs.progressBarName.update(0.3)`
+| Method | Description |
+|---|---|
+| **`update(progress)`** | The recommended way to update the progress of the progress bar is to use the `progress` property. If you prefer, you can use this `update` method to update the progress directly. To access this method, set the `ref` property on the `<ProgressBar>` and call `this.refs.progressBarName.update(0.3)` |