Make .rst the default extension for posts
New post: Vert stack

Linked to a nice post with animations from playspedia, and a short
summary to highlight some points missing from that post.

We need to write something in js to do such animations in html5!
Add author name to template.
Add missing helper template file.
Change the theme to readable based one.
Add license to footer.
Changed the date format on index page and posts