First export of Shan language was made with I23caefae3374028db6475f66244c1ec3627f49ec.
Now it's time to add Shan to MediaWiki core.
'shn' => 'ၽႃႇသႃႇတႆး ', # Shan
In RELEASE-NOTES-1.28, section "Languages updated in 1.28":
* Languages added: ** shn (Shan), thanks to translators Khun Sar, Nemo bis, Piangpha, Saiddzone Saimawnkham, Saosukham, and Sengwan
(Normally I would commit a patch but I have trouble with "git review" to core under Windows 8.1)