Translation of UI (german and english)

Bugfix for feeds
    - removed categories related and up
    - load new books now working
    - category random now working
login page is free of non accessible elements
boolean custom column is vivible in UI
books with only with certain languages can be shown
book shelfs can be deleted from UI
Anonymous user view is more resticted
Added browse of series in sidebar
Dependencys in vendor folder are updated to newer versions (licencs files are now present)
Bugfix editing Authors names
Made upload on windows working

cps/templates/user_list.html

@@ -4,15 +4,15 @@
   <h2>{{title}}</h2>
   <table class="table table-striped">
     <tr>
-        <th>Nickname</th>
-        <th>Email</th>
-        <th>Kindle</th>
-        <th>DLS</th>
-        <th>Admin</th>
-        <th>Download</th>
-        <th>Upload</th>
-        <th>Edit</th>
-        <th>Passwd</th>
+        <th>{{_('Nickname')}}</th>
+        <th>{{_('Email')}}</th>
+        <th>{{_('Kindle')}}</th>
+        <th>{{_('DLS')}}</th>
+        <th>{{_('Admin')}}</th>
+        <th>{{_('Download')}}</th>
+        <th>{{_('Upload')}}</th>
+        <th>{{_('Edit')}}</th>
+        <th>{{_('Passwd')}}</th>
 
     </tr>
     {% for user in content %}
@@ -29,16 +29,16 @@
 
     {% endfor %}
   </table>
-    <div class="btn btn-default"><a href="{{url_for('new_user')}}">Add new user</a></div>
-  <h2>SMTP mail settings</h2>
+    <div class="btn btn-default"><a href="{{url_for('new_user')}}">{{_('Add new user')}}</a></div>
+  <h2>{{_('SMTP mail settings')}}</h2>
   <table class="table table-striped">
     <tr>
-        <th>SMTP hostname</th>
-        <th>SMTP port</th>
-        <th>SSL</th>
-        <th>SMTP login</th>
-        <th>SMTP password</th>
-        <th>From mail</th>
+        <th>{{_('SMTP hostname')}}</th>
+        <th>{{_('SMTP port')}}</th>
+        <th>{{_('SSL')}}</th>
+        <th>{{_('SMTP login')}}</th>
+        <th>{{_('SMTP password')}}</th>
+        <th>{{_('From mail')}}</th>
     </tr>
       <tr>
         <td>{{email.mail_server}}</td>
@@ -50,7 +50,7 @@
 
   </table>
 
-    <div class="btn btn-default"><a href="{{url_for('edit_mailsettings')}}">Change SMTP settings</a></div>
+    <div class="btn btn-default"><a href="{{url_for('edit_mailsettings')}}">{{_('Change SMTP settings')}}</a></div>
 
 </div>
 {% endblock %}