Adds circleRadius docs; closes #18

Author: bkrem

README.md

@@ -90,6 +90,7 @@ class MyComponent extends React.Component {
 | `scaleExtent`         | `object`        | `{min: 0..n, max: 0..n}`              |           | `{min: 0.1, max: 1}`            | Sets the minimum/maximum extent to which the tree can be scaled if `props.zoomable` is true.                                                                                    |
 | `nodeSize`            | `object`        | `{x: 0..n, y: 0..n}`                  |           | `{x: 140, y: 140}`              | Sets a fixed size for each node. <br /><br /> This does not affect node circle sizes, circle sizes are handled by the `circleRadius` prop.                                      |
 | `separation`          | `object`        | `{siblings: 0..n, nonSiblings: 0..n}` |           | `{siblings: 1, nonSiblings: 2}` | Sets separation between neighbouring nodes, differentiating between siblings (same parent) and non-siblings.                                                                    |
+| `circleRadius`        | `number`        | `0..n`                                |           | `10`                            | Sets the radius of each node's `<circle>` element.                                                                                                                              |
 | `transitionDuration`  | `number`        | `0..n`                                |           | `500`                           | Sets the animation duration (in ms) of each expansion/collapse of a tree node. <br /><br /> Set this to `0` to deactivate animations completely.                                |
 | `styles`              | `object`        | see [Styling](#styling)               |           | `Node`/`Link` CSS files         | Overrides and/or enhances the tree's default styling.                                                                                                                           |