specify additional tags for CSV upload

You can now specify additional tags to be added to all entries.
This makes it possible to remove columns that would be identical
for all entries.

pdb-api/src/main/java/org/lucares/pdb/api/Tags.java

@@ -179,6 +179,10 @@ public class Tags implements Comparable<Tags> {
         return Collections.unmodifiableList(tags);
     }
 
+    List<Tag> getTagsUnsafe() {
+        return tags;
+    }
+
     public void forEach(final BiConsumer<String, String> keyValueConsumer) {
 
         for (final Tag tag : tags) {

pdb-api/src/main/java/org/lucares/pdb/api/TagsBuilder.java

@@ -5,7 +5,16 @@ import java.util.List;
 
 public class TagsBuilder {
 
-    final List<Tag> tags = new ArrayList<>();
+    final List<Tag> tags;
+
+    public TagsBuilder() {
+        tags = new ArrayList<>();
+    }
+
+    public TagsBuilder(final Tags tags) {
+        this.tags = new ArrayList<>();
+        this.tags.addAll(tags.getTagsUnsafe());
+    }
 
     public static TagsBuilder create() {
         return new TagsBuilder();
@@ -31,4 +40,5 @@ public class TagsBuilder {
     public Tags build() {
         return Tags.create(tags);
     }
+
 }