Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/rss-importer/readme.txt

@@ -0,0 +1,33 @@
+=== Plugin Name ===
+Contributors: wordpressdotorg
+Tags: importer, rss
+Requires at least: 3.0
+Tested up to: 4.7
+Stable tag: trunk
+License: GPLv2 or later
+License URI: http://www.gnu.org/licenses/gpl-2.0.html
+
+Import posts from an RSS feed.
+
+== Description ==
+
+Import posts from an RSS feed.
+
+== Installation ==
+
+1. Upload the `rss-importer` folder to the `/wp-content/plugins/` directory
+1. Activate the plugin through the 'Plugins' menu in WordPress
+1. Go to the Tools -> Import screen, Click on RSS
+
+== Frequently Asked Questions ==
+
+== Screenshots ==
+
+== Changelog ==
+
+= 0.2 =
+* Update compat
+* Add text domain headers
+
+= 0.1 =
+* Initial release