Move wisski instance code to separate package

internal/wisski/instances/barrel/conf/wisski.conf

@@ -0,0 +1,24 @@
+<VirtualHost *:8080>
+    # the document root -- /var/www/data/project/web
+    DocumentRoot /var/www/data/project/web
+
+    <Directory /var/www/data/project/web>
+        # add types for .owl and .rdf
+        AddType application/rdf+xml .owl
+        AddType application/rdf+xml .rdf
+
+        # Rewrite the 'ontology' directory
+        RewriteEngine On
+        RewriteOptions InheritDownBefore
+        ReWriteRule ^(ontology/[^/]+/).+ $1 [R=303,END]
+        ReWriteRule ^(ontology/[^/]+)/$ sites/default/files/$1.owl [END]
+
+        # Allow overrides of symlinks
+        Options Indexes FollowSymLinks
+        AllowOverride All
+        Require all granted
+    </Directory>
+
+    ErrorLog /dev/stderr
+    CustomLog /dev/stdout combined
+</VirtualHost>