Skeleton files, borrowed from mw-ocg-texter.
Import mwoffliner.js from Kiwix project.

Downloaded from:
 http://sourceforge.net/p/kiwix/other/ci/master/tree/mwoffliner/mwoffliner.js

Upstream commit:
 ab84fbdda29162ed89d76632b5d023ca87d59d90