Added tree-fun, random-tree, clumpiness, and find-clumpiness
Added tree-fun, random-tree, clumpiness, and find-clumpiness

Please add them in that order, as they depend on tree-fun and find-clumpiness depends on clumpiness as well, so I hope it won't all break depending on the order added.
codedmart/stackage,wereHamster/stackage,DanielG/stackage,spencerjanssen/stackage,creichert/stackage,nomeata/stackage,Gabriel439/stackage,peti/stackage,ethercrow/stackage,clinty/stackage,ygale/stackage,garetxe/stackage,Shimuuar/stackage,fimad/stackage,soenkehahn/stackage,agrafix/stackage,alanz/stackage,michalkonecny/stackage,Daniel-Diaz/stackage,fpco/stackage,lwm/stackage,k0ral/stackage,mrkkrp/stackage,athanclark/stackage,int-index/stackage,massysett/stackage,marcinmrotek/stackage,GregorySchwartz/stackage,jaspervdj/stackage,brendanhay/stackage,phadej/stackage,mgajda/stackage,stackbuilders/stackage,l29ah/stackage,simonmichael/stackage,christiaanb/stackage,phaazon/stackage,judah/stackage,asr/stackage,bartavelle/stackage,iand675/stackage,jonschoning/stackage,mstksg/stackage