blog: setup jekyll based blog

- Fix CNAME
- Implement index page feed, atom feed
- Fix author names or other yml tags
- Assets, bootstrap, responsive friendly js/css
- Hello world post
- About and page (as an example), 404

Forked from jekyll-blog (https://github.com/bhaisaab/jekyll-blog)

Signed-off-by: Rohit Yadav <rohit.yadav@wingify.com>