updated WordPress install

Author: mattl

README.md

@@ -5,7 +5,9 @@
 * WordPress is now handled by composer. composer.json contains the
   exact version of WP we're using.
 
-See http://getcomposer.org/ for installation details. 
+See http://getcomposer.org/ for installation details.
+
+* Some times `composer update` will not give any results, in which case `computer remove wordpress && composer require wordpress` will fix the problem.
 
 ## Set-up