Only show individual campsite and “Add campsite” links to admin

Regular users do not need, or can use, those links.

web/templates/admin/campsite/index.gohtml

@@ -11,7 +11,10 @@
 
 {{ define "content" -}}
     {{- /*gotype: dev.tandem.ws/tandem/camper/pkg/campsite.campsiteIndex*/ -}}
-    <a href="/admin/campsites/new">{{( pgettext "Add Campsite" "action" )}}</a>
+    {{ if isAdmin -}}
+        <a href="/admin/campsites/new">{{( pgettext "Add Campsite" "action" )}}</a>
+    {{- end }}
+
     <h2>{{( pgettext "Campsites" "title" )}}</h2>
     {{ if .Campsites -}}
         <form id="booking-filter">
@@ -63,7 +66,13 @@
                 <tbody>
                 {{ range .Campsites -}}
                     <tr>
-                        <th scope="row"><a href="/admin/campsites/{{ .Label }}">{{ .Label }}</a></th>
+                        <th scope="row">
+                            {{- if isAdmin -}}
+                                <a href="/admin/campsites/{{ .Label }}">{{ .Label }}</a>
+                            {{- else -}}
+                                {{ .Label }}
+                            {{- end -}}
+                        </th>
                         {{ range $.Months }}
                             {{ range .Days }}
                                 <td></td>