Changelog for yst-0.3.1.2

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yst 0.3.1.2 (released 15 Sep 2013)

yst 0.3.1.1 (released 08 Mar 2013)

yst 0.3.1 (released 19 Jan 2013)

yst 0.3.0.1 (released 23 Oct 2012)

yst 0.3 (released 20 Oct 2012)