Fixed pipeline-problems(i hope)

_config.yml

@@ -7,9 +7,9 @@ plugins:
   - jekyll-redirect-from
 
 collections:
+  de:
+    output: true
   en:
     output: true
   it:
     output: true
-  de:
-    output: true

_layouts/default.html

@@ -9,7 +9,7 @@ layout: base
 {% if language == "_it" %}
 	{% assign language = "it" %}
 	{% assign links = site.it | sort: "idx" %}
-{% elseif language == "_de" %}
+{% else if language == "_de" %}
 	{% assign language = "de" %}
 	{% assign links = site.de | sort: "idx" %}
 {% else %}