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/rss-query-hpr_total.tpl.xml

@@ -0,0 +1,25 @@
+<!--% USE DBI(constants.driver) %-->
+<!--% query_hpr_feed = DBI.prepare('
+        SELECT
+            eps.id,
+            eps.explicit,
+            strftime(\'%H:%M:%S %d:%m:%Y\', date(eps.date)) AS date,
+            eps.license, eps.duration,
+            eps.title, eps.summary, eps.tags,
+            eps.notes,
+            hosts.local_image,
+            hosts.hostid,
+            hosts.host, hosts.email,
+            miniseries.name AS series, miniseries.id AS seriesid,
+            assets.size AS length
+        FROM eps
+        INNER JOIN hosts ON eps.hostid = hosts.hostid
+        INNER JOIN miniseries ON eps.series = miniseries.id
+        INNER JOIN assets ON eps.id = assets.episode_id
+        WHERE eps.date <= date(\'now\')
+        AND assets.extension = ?
+        ORDER BY eps.date DESC
+')
+%-->
+<!--% feed_result = query_hpr_feed.execute(media_file_extension) %-->
+