Add requirements section to README

README.md

 osTicket
 ========
-osTicket is a widely-used open source support ticket system. It seamlessly
+<a href="http://osticket.com"><img src="http://osticket.com/sites/default/files/osTicket.jpg"
+align="left" hspace="10" vspace="6"></a>
+
+**osTicket** is a widely-used open source support ticket system. It seamlessly
 integrates inquiries created via email, phone and web-based forms into a
 simple easy-to-use multi-user web interface. Manage, organize and archive
 all your support requests and responses in one place while providing your
@@ -16,6 +19,17 @@ osTicket is an attractive alternative to higher-cost and complex customer
 support systems; simple, lightweight, reliable, open source, web-based and
 easy to setup and use. The best part is, it's completely free.
 
+Requirements
+------------
+  * HTTP server running Microsoft® IIS or Apache
+  * PHP version 5.3 or greater
+  * mysqli extension for PHP
+  * MySQL database version 5.0 or greater
+
+### Recommendations
+  * gd, gettext, imap, json, mbstring, and xml extensions for PHP
+  * APC module enabled and configured for PHP
+
 Deployment
 ----------
 osTicket now supports bleeding-edge installations. The easiest way to