README

This is the metapackage that was used to build lsst_sims, pre 2021 (lsst_sims will generally build with lsst DM packages pre w_2021_19 or so, but is likely to fail with any build later than that).

lsst_sims is now deprecated Please see rubin_sim (https://github.com/lsst/rubin_sim) instead.