(bug 61911) use localized number patterns.

When splitting quantitiy strings, use regex patterns derived from
MediaWiki language objects.

IMPORTANT: needs https://github.com/DataValues/Number/pull/2 (that is,
it needs the yet-to-be-released version 0.3 of data-values/numbers).

Change-Id: If2345c45b5da77ca83437aa925e4b36631fafd15