Add 3.0 to http://code.jquery.com/jquery/

[timmywil]

3.0 will need to be added to this page when 3.0 final is released.

Note that links to http://code.jquery.com/jquery-git2.js redirects to 3.0-pre.

[mgol]

I was involved in virtually all this WIP files config (as well as redirections) so I can explain what's been going on. The code for those redirects is in the infra repo.

tl;dr: https://code.jquery.com/jquery-git.js points to master, https://code.jquery.com/jquery-2.x-git.js points to 2.2-stable, https://code.jquery.com/jquery-1.x-git.js points to 1.12-stable.

The timeline of events is as follows:

1. We had jquery-git.js (and jquery-git.min.js but I'll omit minified files for simplicity).
2. jQuery 2 got released, we got jquery-git2.js. jquery-git1.js was added to make it symmetrical with the jQuery 2 version, jquery-git.js & jquery-git1.js were kept identical.
3. We decided to release jQuery 3 & jQuery 3 Compat, therefore jquery-git.js was changed to point to master and we also created jquery-compat-git.js. To not remove files from https://code.jquery.com and at the same time prevent people from using outdated WIP jQuery files, jquery-git1.js was 301-redirected to jquery-compat-git.js and jquery-git2.js was 301-redirected to jquery-git.js.
4. We decided to drop Compat so jquery-compat-git.js was 301-redirected to jquery-git.js. This also made jquery-git1.js redirect to jquery-git.js.
5. @dmethvin told me he needed WIP versions for jQuery 1.x & 2.x for Migrate 1.x purposes; as 301-redirects are supposed to be permanent, I didn't touch jquery-git1.js & jquery-git2.js but instead created jquery-1.x-git.js & jquery-2.x-git.js.

Currently the links from http://code.jquery.com/jquery/ titled "jQuery 2.x git build" & "jQuery 1.x git build" actually redirect to the jQuery 3.x git build.

I don't think we should wait until 3.0 for the links to be updated. They're supposed to point to development versions so they should point to the 3.0 git one. I don't think we need to share the links to the 1.x/2.x Git versions as we're phasing out those lines.

[mgol]

PR: #28.

[dmethvin]

@mgol when you write it all out it looks crazier that it seemed at the time. 😄

[mgol]

I've also automated the jQuery section grouping in 0625896 so no further modifications will be needed when jQuery 3 comes out.