add multiauthor feature

[mansoorbarri]

this PR adds the ability to have multiple authors, fixing #22

[mansoorbarri]

CC: @natrius

[natrius]

At first glance it looks good as far as I'm able to tell. Don't forget to mention it in the readme as well - i think there are some users interested in this.

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[mansoorbarri]

I have updated the docs and README, i think it should be already now. merging in 2 hours.

[natrius]

Hm, i think, i am missing something.

I created quickstart\content\authors\rsmith\_index.md like the mentioned example in gohugoio/hugoDocs#2494 (comment) (and quickstart\content\authors\rsmith2.md as well for testing).
In one of the blog-posts i added in the frontmatter

authorbox: true # Enable authorbox for specific page
authors: ["rsmith", "rsmith2"] # Assuming you have a author profile in /content/authors/exampleauthor.md
---

And all the other stuff. The hugo.toml contains

[Params]
  authorbox = true # Show authorbox at bottom of pages if true
  post_meta = ["author", "date", "categories", "translations"] # Order of post meta information

so it should show, shouldn't it? Don't know if i am missing something. In the public, the authors/rsmith and authors/rsmith2 are created, Visiting http://localhost:1313/roadstertesting/authors/ just shows the file-rsmith2, but not the folder-rsmith.
And visiting http://localhost:1313/roadstertesting/authors/rsmith2/ after that, it does not show the article i added him to.

Maybe i'm really just to tired and missing something.

[mansoorbarri]

it is working for me, i think its because i forgot to add:

[taxonomies]
  author = "authors" 
  tag = "tags"
  category = "categories"

in the site config.toml. adding that and assuming you have everything setup right in the /content/, it should show up like this:

not sure why its not showing the authorbox. fixing that now.

[natrius]

Yeah, adding them shows in the blog article

And i can open the page of them both but just the folder rsmith contains information and social links links to the blog-articles. Just so you know. Should maybe changed or better explained in the hugo.toml or in the example configuration as well.
Just in the top besides the date and news the authors are missing (or is this the authorbox?).

EDIT: And if there is no folder, it just links to the name that is input there. Thats good as well :)

[mansoorbarri]

i tried writing some documentation for this but turns out I am really bad at it. would you mind opening a PR for this?