Revert "Remove unused fontTools.misc.psLib"
Revert "Remove unused fontTools.misc.psLib"

psLib is still used by t1Lib.  I'm not sure whether I want to
drop t1Lib just yet.

This reverts commit e0f84aabfaea36a5a4e1dc161b6c47c3a0bc4e1b.

fonttools/fonttools,googlefonts/fonttools