Shapekey Data Transfer

Please add shapekeys to the data layers transferrable by the Data Transfer modifier and operator. Among other uses, this capability is critical for making clothes for customizable game characters. It also allows you to transfer corrective keys between different characters with the same rig, saving lots of artist time.

The original GSoC for the Data Transfer tool included this (as shown working here: youtube.com/watch ), but for unknown reasons this has sadly been removed from the final version.