Fixed tutorial links, especially to external pages
diff --git a/templates/doc/korap.html.ep b/templates/doc/korap.html.ep
index 08eb9a7..136e14c 100644
--- a/templates/doc/korap.html.ep
+++ b/templates/doc/korap.html.ep
@@ -4,7 +4,7 @@
 
 %= korap_overview 'korap'
 
-<p>The KorAP project was launched in 2011 at the <a href="http://www.ids-mannheim.de/">Institute for the German Language (IDS)</a> in Mannheim, Germany. KorAP is a Corpus Analysis Platform, with an extensible and scalable architecture. It consists of multiple components, that are exchangable due to well defined APIs.</p>
+<p>The KorAP project was launched in 2011 at the <%= doc_ext_link_to 'Institute for the German Language (IDS)', "http://www.ids-mannheim.de/" %> in Mannheim, Germany. KorAP is a Corpus Analysis Platform, with an extensible and scalable architecture. It consists of multiple components, that are exchangable due to well defined APIs.</p>
 
 <dl>
   <dt><%= doc_link_to('Kalamar', 'korap', 'kalamar') %></dt>
@@ -16,9 +16,6 @@
   <dt><%= doc_link_to('Kustvakt', 'korap', 'kustvakt') %></dt>
   <dd>Kustvakt is the central user and policy management service. It takes a query and rewrites it to restrict the scope of a search to documents the user is allowed to. It may also inject further properties the user has set up, like preferred annotation layers. To transfer a query written in a certain query language to the internal general query protocol <%= doc_link_to('KoralQuery', 'api', 'koralquery') %>, Kustvakt uses <%= doc_link_to('Koral', 'korap', 'koral') %>.</dd>
 
-  <dt><%= doc_link_to('Kustvakt', 'korap', 'kustvakt') %></dt>
-  <dd>Kustvakt is the central user and policy management service. It takes a query and rewrites it to restrict the scope of a search to documents the user is allowed to. It may also inject further properties the user has set up, like preferred annotation layers. To transfer a query written in a certain query language to the internal general query protocol <%= doc_link_to('KoralQuery', 'api', 'koralquery') %>, Kustvakt uses <%= doc_link_to('Koral', 'korap', 'koral') %>.</dd>
-
   <dt><%= doc_link_to('Koral', 'korap', 'koral') %></dt>
   <dd>Koral is a library that translates queries written in one of several implemented query languages into a general query protocol, called <%= doc_link_to('KoralQuery', 'api', 'koralquery') %>.</dd>
 
@@ -34,33 +31,35 @@
 <dl>
   <dt>Head</dt>
   <dd>
-    <a href="http://www.ids-mannheim.de/direktion/personal/kupietz.html">Dr. Marc Kupietz</a>,
-    <a href="http://www.ids-mannheim.de/direktion/personal/witt.html">Dr. Andreas Witt</a>
+    <%= doc_ext_link_to 'Dr. Marc Kupietz', "http://www.ids-mannheim.de/direktion/personal/kupietz.html" %>,
+    <%= doc_ext_link_to 'Dr. Andreas Witt', "http://www.ids-mannheim.de/direktion/personal/witt.html" %>
   </dd>
 
   <dt>Scientific Staff</dt>
   <dd>
-    <a href="http://www.ids-mannheim.de/direktion/personal/banski.html">Dr. Piotr Bański</a> (Coordination),
-    <a href="http://nils-diewald.de/">Nils Diewald</a>,
-    <a href="http://www.ids-mannheim.de/direktion/personal/frick/">Elena Frick</a>,
+    <%= doc_ext_link_to 'Dr. Piotr Bański', "http://www.ids-mannheim.de/direktion/personal/banski.html" %> (Coordination),
+    <%= doc_ext_link_to 'Nils Diewald', "http://nils-diewald.de/" %>,
+    <%= doc_ext_link_to 'Elena Frick', "http://www.ids-mannheim.de/direktion/personal/frick/" %>,
     Michael Hanl
   </dd>
 
   <dt>Extended project crew</dt>
   <dd>
-    <a href="http://www.ids-mannheim.de/direktion/personal/bingel.html">Joachim Bingel</a>,
-    <a href="http://www.ids-mannheim.de/direktion/personal/margaretha/">Eliza Margaretha</a>,
-    <a href="http://www.ids-mannheim.de/zdv/personal/bodmer.html">Franck Bodmer</a>,
-    <a href="http://www.ids-mannheim.de/zdv/personal/harders.html">Peter Harders</a>,
-    <a href="http://www.ids-mannheim.de/zdv/personal/krause.html">Helge Stallkamp</a>
+    <%= doc_ext_link_to 'Joachim Bingel', "http://www.ids-mannheim.de/direktion/personal/bingel.html" %>,
+    <%= doc_ext_link_to 'Eliza Margaretha', "http://www.ids-mannheim.de/direktion/personal/margaretha/" %>,
+    <%= doc_ext_link_to 'Franck Bodmer', "http://www.ids-mannheim.de/zdv/personal/bodmer.html" %>,
+    <%= doc_ext_link_to 'Peter Harders', "http://www.ids-mannheim.de/zdv/personal/harders.html" %>,
+    <%= doc_ext_link_to 'Helge Stallkamp', "http://www.ids-mannheim.de/zdv/personal/krause.html" %>
   </dd>
 
   <dt>Past Project Members</dt>
-  <dd><a href="http://www.ids-mannheim.de/direktion/personal/ehemalige/schnober.html">Carsten Schnober</a></dd>
+  <dd>
+    <%= doc_ext_link_to 'Carsten Schnober', "http://www.ids-mannheim.de/direktion/personal/ehemalige/schnober.html" %>
+  </dd>
 
   <dt>Consulting</dt>
   <dd>
-    <a href="http://www.ids-mannheim.de/direktion/personal/belica.html">Cyril Belica</a>,
-    <a href="http://www.ids-mannheim.de/direktion/personal/schonefeld/">Oliver Schonefeld</a>
+    <%= doc_ext_link_to 'Cyril Belica', "http://www.ids-mannheim.de/direktion/personal/belica.html" %>,
+    <%= doc_ext_link_to 'Oliver Schonefeld', "http://www.ids-mannheim.de/direktion/personal/schonefeld/" %>
   </dd>
 </dl>