combinatorics/polyhedron: Added a Polyhedron class.
combinatorics/polyhedron: Added a Polyhedron class.

Signed-off-by: Saptarshi Mandal <13ec3c7bab52575f3a0cda6406c76269cc13b041@gmail.com>

beni55/sympy,Titan-C/sympy,sampadsaha5/sympy,abloomston/sympy,Shaswat27/sympy,skidzo/sympy,abloomston/sympy,AkademieOlympia/sympy,ga7g08/sympy,MridulS/sympy,aktech/sympy,shikil/sympy,farhaanbukhsh/sympy,ahhda/sympy,Designist/sympy,kaushik94/sympy,amitjamadagni/sympy,sahmed95/sympy,cswiercz/sympy,beni55/sympy,ChristinaZografou/sympy,jaimahajan1997/sympy,dqnykamp/sympy,pbrady/sympy,Designist/sympy,bukzor/sympy,aktech/sympy,liangjiaxing/sympy,skidzo/sympy,wyom/sympy,ahhda/sympy,cswiercz/sympy,atsao72/sympy,Mitchkoens/sympy,oliverlee/sympy,rahuldan/sympy,drufat/sympy,asm666/sympy,MechCoder/sympy,Arafatk/sympy,AkademieOlympia/sympy,liangjiaxing/sympy,Gadal/sympy,amitjamadagni/sympy,Curious72/sympy,farhaanbukhsh/sympy,sampadsaha5/sympy,MridulS/sympy,madan96/sympy,Sumith1896/sympy,dqnykamp/sympy,Davidjohnwilson/sympy,MechCoder/sympy,mcdaniel67/sympy,sunny94/temp,Curious72/sympy,dqnykamp/sympy,VaibhavAgarwalVA/sympy,souravsingh/sympy,pandeyadarsh/sympy,kaushik94/sympy,iamutkarshtiwari/sympy,jbbskinny/sympy,atreyv/sympy,sampadsaha5/sympy,shipci/sympy,maniteja123/sympy,sunny94/temp,kmacinnis/sympy,Davidjohnwilson/sympy,yashsharan/sympy,Shaswat27/sympy,bukzor/sympy,MechCoder/sympy,ChristinaZografou/sympy,kaichogami/sympy,Titan-C/sympy,shikil/sympy,wanglongqi/sympy,moble/sympy,pandeyadarsh/sympy,diofant/diofant,kmacinnis/sympy,sahilshekhawat/sympy,lidavidm/sympy,jbbskinny/sympy,cccfran/sympy,lidavidm/sympy,Gadal/sympy,kevalds51/sympy,meghana1995/sympy,atreyv/sympy,Arafatk/sympy,Shaswat27/sympy,emon10005/sympy,jamesblunt/sympy,yukoba/sympy,toolforger/sympy,debugger22/sympy,jaimahajan1997/sympy,abhiii5459/sympy,iamutkarshtiwari/sympy,grevutiu-gabriel/sympy,maniteja123/sympy,mcdaniel67/sympy,ga7g08/sympy,saurabhjn76/sympy,drufat/sympy,yukoba/sympy,drufat/sympy,jbbskinny/sympy,atsao72/sympy,debugger22/sympy,Vishluck/sympy,chaffra/sympy,sunny94/temp,toolforger/sympy,Sumith1896/sympy,hrashk/sympy,saurabhjn76/sympy,moble/sympy,vipulroxx/sympy,skidzo/sympy,Mitchkoens/sympy,yashsharan/sympy,AunShiLord/sympy,hargup/sympy,grevutiu-gabriel/sympy,postvakje/sympy,rahuldan/sympy,hargup/sympy,atreyv/sympy,bukzor/sympy,VaibhavAgarwalVA/sympy,kmacinnis/sympy,shipci/sympy,Vishluck/sympy,toolforger/sympy,asm666/sympy,cccfran/sympy,pandeyadarsh/sympy,Arafatk/sympy,AkademieOlympia/sympy,wanglongqi/sympy,jerli/sympy,jamesblunt/sympy,Curious72/sympy,abloomston/sympy,garvitr/sympy,cccfran/sympy,lidavidm/sympy,debugger22/sympy,shipci/sympy,madan96/sympy,Gadal/sympy,Vishluck/sympy,emon10005/sympy,garvitr/sympy,postvakje/sympy,ChristinaZografou/sympy,sahmed95/sympy,iamutkarshtiwari/sympy,mafiya69/sympy,VaibhavAgarwalVA/sympy,jerli/sympy,ga7g08/sympy,farhaanbukhsh/sympy,beni55/sympy,Mitchkoens/sympy,hrashk/sympy,souravsingh/sympy,kaushik94/sympy,oliverlee/sympy,abhiii5459/sympy,kevalds51/sympy,vipulroxx/sympy,skirpichev/omg,kumarkrishna/sympy,meghana1995/sympy,grevutiu-gabriel/sympy,kaichogami/sympy,mcdaniel67/sympy,AunShiLord/sympy,madan96/sympy,kevalds51/sympy,liangjiaxing/sympy,lindsayad/sympy,pbrady/sympy,Davidjohnwilson/sympy,lindsayad/sympy,maniteja123/sympy,asm666/sympy,garvitr/sympy,Sumith1896/sympy,jaimahajan1997/sympy,abhiii5459/sympy,ahhda/sympy,meghana1995/sympy,chaffra/sympy,sahilshekhawat/sympy,rahuldan/sympy,souravsingh/sympy,shikil/sympy,hargup/sympy,oliverlee/sympy,AunShiLord/sympy,atsao72/sympy,mafiya69/sympy,yukoba/sympy,sahmed95/sympy,kumarkrishna/sympy,wyom/sympy,pbrady/sympy,aktech/sympy,vipulroxx/sympy,Designist/sympy,kumarkrishna/sympy,saurabhjn76/sympy,wyom/sympy,sahilshekhawat/sympy,yashsharan/sympy,wanglongqi/sympy,jerli/sympy,MridulS/sympy,lindsayad/sympy,jamesblunt/sympy,Titan-C/sympy,emon10005/sympy,mafiya69/sympy,cswiercz/sympy,hrashk/sympy,moble/sympy,postvakje/sympy,kaichogami/sympy,chaffra/sympy