Publish API docs on GitHub pages

[ashawley]

I published a bunch of old versions of scala-xml to the gh-pages branch. This updates the README link to the API docs. There's also a prototype script to build docs for a version tag and commit.

[SethTisue]

nice!!

two questions:

• is there release-process documentation that we should add "run admin/api-docs.sh" to?
• is there stuff on https://www.scala-lang.org we should ask Fabien to actually remove?

[SethTisue]

oh, also, the readme links to 1.1.0, isn't the current version 1.1.1? #277

[ashawley]

I've added notes in the Publishing guide.

[ashawley]

Yeah, we probably could delete copies of the scala-xml docs on www.scala-lang.org.

Could we start with just adding redirects?

Redirect /api/2.11.0/scala-xml/ https://scala.github.io/scala-xml/api/1.0.1/
Redirect /api/2.11.1/scala-xml/ https://scala.github.io/scala-xml/api/1.0.1/
Redirect /api/2.11.2/scala-xml/ https://scala.github.io/scala-xml/api/1.0.2/
Redirect /api/2.11.3/scala-xml/ https://scala.github.io/scala-xml/api/1.0.2/
Redirect /api/2.11.4/scala-xml/ https://scala.github.io/scala-xml/api/1.0.2/
Redirect /api/2.11.5/scala-xml/ https://scala.github.io/scala-xml/api/1.0.3/
Redirect /api/2.11.6/scala-xml/ https://scala.github.io/scala-xml/api/1.0.3/
Redirect /api/2.11.7/scala-xml/ https://scala.github.io/scala-xml/api/1.0.4/
Redirect /api/2.11.8/scala-xml/ https://scala.github.io/scala-xml/api/1.0.4/
Redirect /api/2.11.9/scala-xml/ https://scala.github.io/scala-xml/api/1.0.5/
Redirect /api/2.11.10/scala-xml/ https://scala.github.io/scala-xml/api/1.0.5/
Redirect /api/2.11.11/scala-xml/ https://scala.github.io/scala-xml/api/1.0.5/
Redirect /api/2.11.12/scala-xml/ https://scala.github.io/scala-xml/api/1.0.5/
Redirect /api/2.12.0/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.12.1/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.12.2/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.12.3/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.12.4/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.12.5/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.12.6/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.12.7/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.13.0-M1/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.13.0-M2/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/
Redirect /api/2.13.0-M3/scala-xml/ https://scala.github.io/scala-xml/api/1.0.6/

There's probably a way to write regex versions of the above, but I'm no longer an Apache mod_rewrite wizard.

[SethTisue]

@fsalvi is this something you could take care of...?

[fsalvi]

Ok, I added the redirects...

[SethTisue]

super, thanks Fabien!

[ashawley]

Redirects look good, thanks!