[GreaseMonkey] Display “Unity Version Added” info in API Docs

Firefox GreaseMonkey plugin to display Unity version info in Unity API docs pages (to which version it was first added)

Setup:
1. Install https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/
2. Click the greasemonkey icon in firefox toolbar, select New User Script
3. Take raw script source from https://gist.githubusercontent.com/…0cc6e1d0b41/UnityDocsShowFirstVersionAdded.cs *full link: https://gist.github.com/unitycoder/48b46d0192e2cce356c2731c8f274880
4. Paste into user script, Save
5. Refresh docs page, like https://docs.unity3d.com/ScriptReference/LowLevel.PlayerLoop.html

Related thread:
https://forum.unity.com/threads/add-version.1408609/

GreaseMonkey Source:
https://gist.github.com/unitycoder/48b46d0192e2cce356c2731c8f274880