Please add GT package to QuickLisp

[eschulte]

Hi,

Can you please add the GT package to QuickLisp. GT is a utility package that combines CL, ALEXANDRIA, SERAPEUM, FSET, and some pieces of other common libraries into a single package (making heavy use of the :use-reexport functionality of uiop/package:def-package).

This package is available at https://github.com/grammatech/cl-utils.

Thanks!
Eric

P.S. We should have done this sooner as we've already caused an issue with other external packages that require this package. GrammaTech/sel#14