docs for before/afterButton

Author: mattly

docs/examples/InputAddons.js

@@ -4,6 +4,10 @@ var inputAddonsInstance = (
       <Input type="text" addonAfter=".00" />
       <Input type="text" addonBefore="$" addonAfter=".00" />
       <Input type="text" addonAfter={<Glyphicon glyph="music" />} />
+      <Input type="text" buttonBefore={<Button>Before</Button>} />
+      <Input type="text" buttonAfter={<DropdownButton title="Action">
+        <MenuItem key="1">Item</MenuItem>
+      </DropdownButton>} />
     </form>
   );
 

docs/src/ComponentsPage.js

@@ -512,7 +512,7 @@ var ComponentsPage = React.createClass({
                   <p>Supports <code>select</code>, <code>textarea</code>, <code>static</code> as well as standard HTML input types.</p>
                   <ReactPlayground codeText={fs.readFileSync(__dirname + '/../examples/InputTypes.js', 'utf8')} />
                   <h2 id="input-addons">Add-ons</h2>
-                  <p>Use <code>addonBefore</code> and <code>addonAfter</code>. Does not support buttons directly, but they support anything that is renderable.
+                  <p>Use <code>addonBefore</code> and <code>addonAfter</code> for normal addons, <code>buttonBefore</code> and <code>buttonAfter</code> for button addons.
                   Exotic configurations may require some css on your side.</p>
                   <ReactPlayground codeText={fs.readFileSync(__dirname + '/../examples/InputAddons.js', 'utf8')} />
                   <h2 id="input-validation">Validation</h2>