add configurable limits

templates/footer.html

@@ -1,2 +1,2 @@
 <hr/>
-Generated by Itsy-Gitsy on {{ts_to_git_timestamp(ts=site_generated_ts, tz=site_generated_offset)}}<br/>
+Generated by {{extra | get(key="generated_by", default="Itsy-Gitsy")}} on {{ts_to_git_timestamp(ts=site_generated_ts, tz=site_generated_offset)}}<br/>

templates/header.html

@@ -1,3 +1,3 @@
 Site: {{site_name}}<br/>
-Extra settings: {{extra.global_user_defined_vars}}<br/>
+Description: {{site_description}}<br/>
 <hr/>

templates/repos.html

@@ -2,6 +2,6 @@
 
 {% block content %}
 {% for repo in repos | sort(attribute="name") -%}
-<a href="{{repo.name}}/summary.html">{{ repo.name }}</a> ({{repo.metadata.website}}) [{{repo.metadata.attributes | get(key="some_extra_thing", default="")}}] ({{ts_to_date(ts=repo.history[0].ts_utc, tz=repo.history[0].ts_offset)}})<br/>
+<a href="{{repo.name}}/summary.html">{{ repo.name }}</a> ({{repo.metadata.website}}) [{{repo.metadata.attributes | get(key="status", default="unknown")}}] ({{ts_to_date(ts=repo.history[0].ts_utc, tz=repo.history[0].ts_offset)}})<br/>
 {% endfor -%}
 {% endblock content %}