Add command line options for feed subtitle and author details.

gemfeed.py

@@ -36,10 +36,16 @@ def main():
 
     # Parse arguments
     parser = argparse.ArgumentParser(description='Generate an Atom feed for Gemini content.')
+    parser.add_argument('-a', '--author', dest='author', type=str,
+            help="feed author's name")
     parser.add_argument('-b', '--base', dest='base_url', type=str,
             required=True, help='base URL for feed and entries')
+    parser.add_argument('-e', '--email', dest='email', type=str,
+            help="feed author's email address")
     parser.add_argument('-o', '--output', dest='output', type=str,
             default="atom.xml", help='output filename')
+    parser.add_argument('-s', '--subtitle', dest='subtitle', type=str,
+            help='feed subtitle')
     parser.add_argument('-t', '--title', dest='title', type=str,
             default="A Gemini feed", help='feed title')
     args = parser.parse_args()
@@ -54,6 +60,15 @@ def main():
     feed = FeedGenerator()
     feed.id(args.base_url)
     feed.title(args.title)
+    if args.subtitle:
+        feed.subtitle(args.subtitle)
+    author = {}
+    if args.author:
+        author["name"] = args.author
+    if args.email:
+        author["email"] = args.email
+    if author:
+        feed.author(author)
     feed.link(href=args.base_url, rel='alternate')
     feed.link(href=args.base_url + args.output, rel='self')