Add selda + associated packages back in
Add selda + associated packages back in

GHC 8.2 build failure is fixed as of 0.1.10.0.
mgajda/stackage,int-index/stackage,wereHamster/stackage,athanclark/stackage,k0ral/stackage,asr/stackage,garetxe/stackage,fpco/stackage,lwm/stackage,soenkehahn/stackage,michalkonecny/stackage,mrkkrp/stackage,jonschoning/stackage,phaazon/stackage,peti/stackage,mstksg/stackage,stackbuilders/stackage,massysett/stackage,spencerjanssen/stackage,iand675/stackage,ygale/stackage,creichert/stackage,ethercrow/stackage,fimad/stackage,GregorySchwartz/stackage,clinty/stackage,Shimuuar/stackage,simonmichael/stackage,Daniel-Diaz/stackage