Add sitemap

[Spksh]

Make googlebot happy.

[Spksh]

https://support.google.com/webmasters/answer/183668?hl=en&ref_topic=4581190

Text
If your sitemap includes only web page URLs, you can provide Google with a simple text file that contains one URL per line. For example:

http://www.example.com/file1.html
http://www.example.com/file2.html

Guidelines for text file sitemaps:

• Encode your file using UTF-8 encoding.
• Your text file should contain nothing but the list of URLs.
• You can name the text file anything you wish, provided it has a .txt extension (for instance, sitemap.txt).