Dealing with single values (name-only author, only one publication)

[mslw]

1. If one publication is defined, the main parsing loop will produce a dict. Subsequent code expects a list, and would iterate over a dictionary instead.
2. When an author is provided with only a name (only mandatory), and no subsequent columns, it will be parsed as a string. Subsequent code expects a dict, and would try to get by key.

This is a simple patch that deals with this cases "downstream", but maybe it would be better to change the main parsing loop.

diff --git a/bin/tubby2catalog b/bin/tubby2catalog
index e8488d5..84d3cc5 100755
--- a/bin/tubby2catalog
+++ b/bin/tubby2catalog
@@ -212,10 +212,15 @@ def map_to_catalog(metadata, config):
         elif key == 'publications':
             if key not in meta_item.keys():
                 meta_item[key] = []
-            for pub in metadata[key]:
-                meta_item[key].append(
-                    get_publication(pub)
-                )
+            if isinstance(metadata[key], dict):
+                # only a single item was found, do not iterate
+                pub = metadata[key]
+                meta_item[key].append(get_publication(pub))
+            else:
+                for pub in metadata[key]:
+                    meta_item[key].append(
+                        get_publication(pub)
+                    )
         else:
             meta_item[key] = metadata[key]
 
@@ -250,9 +255,16 @@ def get_dataset_version(input):
 
 
 def get_author(author):
-    full_name = author.get('full_name', None)
-    email = author.get('email', None)
-    orcid = author.get('orcid', None)
+    if isinstance(author, str):
+        # single-values are not mapped into dictionaries
+        # putting more tabs doesn't help because rstrip strips them all
+        full_name = author
+        email = None
+        orcid = None
+    else:
+        full_name = author.get('full_name', None)
+        email = author.get('email', None)
+        orcid = author.get('orcid', None)
     identifiers = [{
         'type': 'ORCID',
         'identifier': orcid