Remove MySQL specific code from site generation code

- site-generator is generic, so no changes.
 - removed mysql information from site.cfg.
 - Updated template files to call sqlite queries directly.
 - Renamed the query files - remove sqlite from file names.
 - Deleted MySQL specific template files.

templates/content-correspondents.tpl.html

@@ -3,7 +3,7 @@
 <article>
 	<h2 class="title">Correspondents</h2>
 	<p>For more information on how to become a Correspondent see our <a href="<!--% absolute_url(baseurl) %-->about.html#so_you_want_to_record_a_podcast">contribute</a></center> page. To add a logo here, either email one to admin at hpr or setup your email on <a href="https://en.gravatar.com/">Gravatar</a>. To protect your browsing privacy we gather the images every hour and serve them directly from HPR.<p />
-<!--% USE DBI(constants.driver, constants.user, constants.password) %-->
+<!--% USE DBI(constants.driver) %-->
 <!--% host_cnt = 0 %-->
 	<table class="hosts">
 	<th >Avatar</th>