Note availability of local Zotero option in README

README.md

@@ -16,7 +16,7 @@ Then:
 
 ``` python
 from pyzotero import zotero
-zot = zotero.Zotero(library_id, library_type, api_key)
+zot = zotero.Zotero(library_id, library_type, api_key) # local=True for read access to local Zotero
 items = zot.top(limit=5)
 # we've retrieved the latest five top-level items in our library
 # we can print each item's item type and ID