Added Oleg Grenrus' boolean-normal-forms
Added Oleg Grenrus' boolean-normal-forms

Emailed Oleg that I added it under my name; will remove if he requests me to do so or if he adds it under his own name.
soenkehahn/stackage,massysett/stackage,clinty/stackage,stackbuilders/stackage,spencerjanssen/stackage,wereHamster/stackage,fpco/stackage,michalkonecny/stackage,simonmichael/stackage,Daniel-Diaz/stackage,int-index/stackage,fimad/stackage,athanclark/stackage,mgajda/stackage,mrkkrp/stackage,mstksg/stackage,ethercrow/stackage,peti/stackage,iand675/stackage,jonschoning/stackage,asr/stackage