✨ allow customization to handle capital AND in author list (#9)

* Change as proposed by #282

* Unit tests

Author: MiWeiss

bibtexparser/customization.py

@@ -345,7 +345,8 @@ def author(record):
     """
     if "author" in record:
         if record["author"]:
-            record["author"] = getnames([i.strip() for i in record["author"].replace('\n', ' ').split(" and ")])
+            record["author"] = getnames([i.strip() for i in re.split(r"\ and\ ", record["author"].replace('\n', ' '),
+                                                                     flags=re.IGNORECASE)])
         else:
             del record["author"]
     return record

bibtexparser/tests/data/book_capital_AND.bib

@@ -0,0 +1,8 @@
+@BOOK{Bird1987,
+  title = {Dynamics of Polymeric Liquid},
+  publisher = {Wiley Edition},
+  year = {1987},
+  author = {Bird, R.B. and Armstrong, R.C. AND Hassager, O.},
+  volume = {1},
+  edition = {2},
+}

bibtexparser/tests/test_bparser.py

@@ -398,7 +398,7 @@ def test_book(self):
         self.assertEqual(res, expected)
 
     def test_book_cust_unicode(self):
-        with open('bibtexparser/tests/data/book.bib', 'r') as bibfile:
+        with open('bibtexparser/tests/data/book_capital_AND.bib', 'r') as bibfile:
             bib = BibTexParser(bibfile.read(), customization=customizations_unicode)
             res = bib.get_entry_list()
             expected = [{'ENTRYTYPE': 'book',