Rehosted scripts from the defunct Unity community wiki. Links for reference:
https://web.archive.org/web/20200628030416/http://wiki.unity3d.com/index.php/SceneAutoLoader
(I customized this to use enums instead of strings) https://web.archive.org/web/20200623113501/http://wiki.unity3d.com/index.php/CSharpMessenger_Extended
(I rewrote this one) https://web.archive.org/web/20200630011331/http://wiki.unity3d.com/index.php/SkyboxBlended
(relevant forum discussion) https://forum.unity.com/threads/the-unify-wiki-are-you-aware-of-it.179901/page-2#post-7545115