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-index.tpl.html

@@ -4,7 +4,7 @@
 <!--% PROCESS 'shared-show-transcript.tpl.html' %-->
 <!--% PROCESS 'shared-call_for_shows.tpl.html' %-->
 <!--% INCLUDE 'content-index-announcement.tpl.html' %-->
-<!--% PROCESS "queries-index-${constants.database}.tpl.html" %-->
+<!--% PROCESS "queries-index.tpl.html" %-->
 <!--% MACRO tidy_notes(all_lines) BLOCK %-->
 <!--% lines = all_lines %-->
 <!--% after_html = all_lines %-->
@@ -29,7 +29,7 @@
         <h3>Welcome to HPR, the Community Podcast</h3>
     </header>
 	<!--% days_till_next_episode = 0 %-->
-	<!--% USE DBI(constants.driver, constants.user, constants.password) %-->
+	<!--% USE DBI(constants.driver) %-->
 	<!--% USE date %-->
 	<!--% calc = date.calc %-->
 	<!--% episodes = DBI.query(query_next_available_episode).get_all() %-->