add website and sqlite client manager

ReadMe.html

@@ -65,7 +65,7 @@ <h2>Contents</h2>
 	<li>One of the following:</li>
 	<ul>
 		<li><a href="http://www.mysql.org" target="_blank">A MySQL server and database setup</a></li>
-		<li><a href="" target="_blank">A SQLite database setup</a></li>
+		<li><a href="https://www.sqlite.org" target="_blank">A SQLite database setup</a></li>
 	</ul>
 	<li><a href="http://www.mysql.com/downloads/connector/net/">MySQL Connector for .NET</a> The program has been
 	successfully tested with version 6.5.4</li>
@@ -139,6 +139,8 @@ <h2>Contents</h2>
 				<li>So, for example you might have:</li>
 				<pre>\arma 2 operation arrowhead\sqlite\weaponslite.sqlite</pre>
 				<li>Make sure your database name matches the name in the Databases.txt file (minus the .sqlite ending of course).</li>
+				<li>If you need a client for creating and managing SQLite databases, <a href="https://addons.mozilla.org/en-US/firefox/addon/sqlite-manager/">
+				this Firefox plugin</a> is quite nice.</li>
 			</ul>
 		<li>Straight queries:</li>
 			<ul>