template: custom themes for agenda

For agenda a custom theme can be configured in locations/theme.
Templates are read from the subdirectory "templates/<theme>/".  The
default theme is "default".  All Templates are moved to
templates/default.

website/agenda/templates/default/event_perl.txt

@@ -0,0 +1,33 @@
+<TMPL_IF use_client_cache>Cache-Control: max-age=600, must-revalidate
+</TMPL_IF>Content-type:text/plain; charset=utf-8;
+
+$events=[
+<TMPL_LOOP NAME=events>
+{
+	'event_id'		    => q|<TMPL_VAR event_id>|,
+	'start_date'		=> q|<TMPL_VAR start_date>|,
+	'start_datetime'	=> q|<TMPL_VAR start_datetime>|,
+	'end_datetime'		=> q|<TMPL_VAR end_datetime>|,
+	'weekday_short_name'	=> q|<TMPL_VAR weekday_short_name>|,
+	'location'		    => q|<TMPL_VAR location_mapped>|,
+	'location_mapped'	=> q|<TMPL_VAR location_mapped>|,
+	'image'			    => q|<TMPL_VAR image>|,
+	'project_title'	    => q|<TMPL_VAR project_title>|,
+	'program'		    => q|<TMPL_VAR program>|,
+	'series_name'	    => q|<TMPL_VAR series_name>|,
+	'title'			    => q|<TMPL_VAR title>|,
+	'user_title'	    => q|<TMPL_VAR user_title>|,
+	'excerpt'		    => q|<TMPL_VAR excerpt>|,
+	'user_excerpt'	    => q|<TMPL_VAR user_excerpt>|,
+	'episode'	        => q|<TMPL_VAR episode>|,
+	'full_title'        => q|<TMPL_VAR full_title>|,
+	'content'		    => q|<TMPL_VAR content>|
+}<TMPL_UNLESS __last__>,</TMPL_UNLESS>
+</TMPL_LOOP>
+];
+
+
+
+<TMPL_IF asd>
+	'content'		=> q$<TMPL_VAR content>$
+</TMPL_IF>