It's better for three reasons:
* It is a predefined frontmatter variable from Hugo.
* When unset, it is basically the '.Date'.
* More specific and the 'date' variable can now be assigned for the
creation date.
I've updated the README to include installation instructions with Hugo
modules which is pretty handy. Also, the recipe section in the README is
removed which I think is getting too big. Maybe, it should be on its own
folder or branch.
All of the listed changes should be indicated in the changelog.
