Add German translation

README.md

@@ -26,6 +26,7 @@ To then run it locally `bundle exec jekyll serve`
 If you would like to translate the guide then please open a pull request or open an issue
 if you need some help getting it setup.
 
+* [German/Deutsch](http://www.sqlstyle.guide/de/) by [AStasyK](https://github.com/AStasyK)
 * [Japanese/日本語](http://www.sqlstyle.guide/ja/) by [nkurigit](https://github.com/nkurigit)
 * [Portuguese (Brazil)/Português (BR)](http://www.sqlstyle.guide/pt-br/) by [pmarcus93](https://github.com/pmarcus93)
 * [Russian/Русский](http://www.sqlstyle.guide/ru/) by [denpatin](https://github.com/denpatin)

_includes/foot.html

@@ -2,6 +2,10 @@
     <hr/>
     <nav class="translation-nav">
         <span>Translations:</span>
+        <a href="{{ site.url }}/de/" itemprop="availableLanguage" itemscope itemtype="http://schema.org/Language">
+            <span itemprop="name" alternateName="de" title="Deutsch (German)" lang="de">Deutsch</span>
+        </a>
+        ·
         <a href="{{ site.url }}" itemprop="availableLanguage" itemscope itemtype="http://schema.org/Language">
             <span itemprop="name" alternateName="en" title="English">English</span>
         </a>

_includes/head.html

@@ -4,6 +4,10 @@
 <div id="translation-bar">
     <div class="wrap">
         <nav class="translation-nav">
+            <a href="{{ site.url }}/de/" itemprop="availableLanguage" itemscope itemtype="http://schema.org/Language">
+                <span itemprop="name" alternateName="de" title="Deutsch (German)" lang="de">Deutsch</span>
+            </a>
+            ·
             <a href="{{ site.url }}" itemprop="availableLanguage" itemscope itemtype="http://schema.org/Language">
                 <span itemprop="name" alternateName="en" title="English">English</span>
             </a>