Moritz Bunkus has updated his mkvtoolnix to version 3.2.0. You can find the ChangeLog and download it on his website.

mkvtoolnix is a suite of software that help manage Matroska files. It runs on just about every desktop platform on the market, with some GUI available too. mkvmerge is the main tool to create and manipulate Matroska files and mkvinfo can give you detailed information on the content of Matroska files.