Update header partial and remoev table partial

Long overdue

src/app/views/partials/_header.zmpl

@@ -1,7 +1,11 @@
 <a class="header-link" href="/">Zuletzt</a> 
+<a class="header-link" href="/artists">Artists</a> 
+<a class="header-link" href="/albums">Albums</a> 
+<a class="header-link" href="/songs">Songs</a> 
 <a class="header-link" href="/scrobbles">Scrobbles</a>
 <a class="header-link" href="/concerts">Concerts</a>
 <a class="header-link" href="/collection">Collection</a>
 <a class="header-link" href="/ratings">Ratings</a>
 <a class="header-link" href="/lists">Lists</a>
+<a class="header-link" href="/groups">Groups</a> 
 <hr>

src/app/views/partials/_table.zmpl

@@ -1,22 +0,0 @@
-@args table_data: *ZmplValue, table_headers: *ZmplValue
-
-<table>
-<tr>
-@for (table_headers) |text| {
-    <th>{{text}}</th>
-}
-</tr>
-
-    @for (table_data) |value| {
-    <tr>
-       <td class=cell>{{value.track}}</td> 
-       <td class=cell>
-       @for (value.get("artists").?) |artist| {
-       {{artist}}
-       }
-       </td> 
-       <td class=cell>{{value.album}}</td> 
-       <td class=cell>{{value.date}}</td> 
-    </tr>
-    }
-</table>