Add missing file and enhance README

Author: dshanske

README.md

@@ -47,6 +47,11 @@ The IndieWeb community defines several types of feedback:
 
 See [Extensions](https://indieweb.org/Semantic_Linkbacks#Extensions)
 
+### How do I add this into my plugin? ###
+
+The plugin will automatically enhance webmentions, trackbacks, and pingbacks with an avatar and additional context. It will also automatically add a facepile instead of individual
+comments, but this feature can either be turned off by an aware theme or under Discussion in your Settings.
+
 ### Who made the logos? ###
 
 The Webmention and Pingback logos are made by [Aaron Parecki](http://aaronparecki.com) and the Microformats logo is made by [Dan Cederholm](http://simplebits.com/work/microformats/)

readme.txt

@@ -47,6 +47,11 @@ The IndieWeb community defines several types of feedback:
 
 See [Extensions](https://indieweb.org/Semantic_Linkbacks#Extensions)
 
+= How do I add this into my plugin? = 
+
+The plugin will automatically enhance webmentions, trackbacks, and pingbacks with an avatar and additional context. It will also automatically add a facepile instead of individual
+comments, but this feature can either be turned off by an aware theme or under Discussion in your Settings.
+
 = Who made the logos? =
 
 The Webmention and Pingback logos are made by [Aaron Parecki](http://aaronparecki.com) and the Microformats logo is made by [Dan Cederholm](http://simplebits.com/work/microformats/)

templates/semantic-linkbacks-discussion-settings.php

@@ -0,0 +1,12 @@
+<fieldset id="semantic_linkbacks">
+	<?php if ( apply_filters( 'semantic_linkbacks_facepiles', true ) ) { ?>
+	<label for="semantic_linkbacks_facepiles">
+		<input type="checkbox" name="semantic_linkbacks_facepiles" id="semantic_linkbacks_facepiles" value="1" <?php
+			echo checked( true, get_option( 'semantic_linkbacks_facepiles' ) );  ?> />
+		<?php _e( 'Automatically embed facepile <small>(May not work on all themes)</small>', 'semantic-linkbacks' ) ?>
+	</label>
+
+	<br />
+	<?php } ?>
+
+</fieldset>