Suggest install of simplepie lib (been removed from SS core master)

code/widgets/RSSWidget.php

@@ -66,10 +66,17 @@ function getFeedItems() {
 				return $output;
 			}
 
-			include_once(Director::getAbsFile(SAPPHIRE_DIR . '/thirdparty/simplepie/simplepie.inc'));
+			if(!class_exists('SimplePie')) {
+				throw new LogicException(
+					'Please install the "simplepie/simplepie" library by adding it to the "require" '
+					+ 'section of your composer.json'
+				);
+			}
 
 			$t1 = microtime(true);
-			$feed = new SimplePie($this->AbsoluteRssUrl, TEMP_FOLDER);
+			$feed = new SimplePie();
+			$feed->set_feed_url($this->AbsoluteRssUrl);
+			$feed->set_cache_location(TEMP_FOLDER);
 			$feed->init();
 			if($items = $feed->get_items(0, $this->NumberToShow)) {
 				foreach($items as $item) {

composer.json

@@ -18,9 +18,10 @@
 	{
 		"silverstripe/cms": ">=3.1.x-dev,<4.0"
 	},
-	"suggests":
+	"suggest":
 	{
-		"silverstripe/widgets": "dev-master",
-		"silverstripe/comments": "dev-master"
+		"silverstripe/widgets": "Additional 'sidebar features', e.g. a list of recent posts and a tagcloud",
+		"silverstripe/comments": "Enable user comments on any page type, including blog posts",
+		"simplepie/simplepie": "Parse RSS feeds, required for the RSS widget"
 	}
 }