Add duplicated document scan support.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/documents/admin.py

@@ -4,7 +4,7 @@ from django.contrib import admin
 
 from .models import (
     DeletedDocument, Document, DocumentPage, DocumentType,
-    DocumentTypeFilename, DocumentVersion, RecentDocument
+    DocumentTypeFilename, DocumentVersion, DuplicatedDocument, RecentDocument
 )
 
 
@@ -55,6 +55,13 @@ class DocumentTypeAdmin(admin.ModelAdmin):
     )
 
 
+@admin.register(DuplicatedDocument)
+class DuplicatedDocumentAdmin(admin.ModelAdmin):
+    list_display = (
+        'document', 'datetime_added'
+    )
+
+
 @admin.register(RecentDocument)
 class RecentDocumentAdmin(admin.ModelAdmin):
     date_hierarchy = 'datetime_accessed'