combinatorics/partitions: Added routine to enable comparison of partitions on the basis of its rank.
combinatorics/partitions: Added routine to enable comparison of
partitions on the basis of its rank.

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

sahilshekhawat/sympy,bukzor/sympy,lindsayad/sympy,drufat/sympy,postvakje/sympy,skidzo/sympy,moble/sympy,mcdaniel67/sympy,atsao72/sympy,saurabhjn76/sympy,sampadsaha5/sympy,debugger22/sympy,mcdaniel67/sympy,AunShiLord/sympy,kumarkrishna/sympy,ChristinaZografou/sympy,VaibhavAgarwalVA/sympy,atsao72/sympy,maniteja123/sympy,kaichogami/sympy,Vishluck/sympy,shipci/sympy,AkademieOlympia/sympy,farhaanbukhsh/sympy,lindsayad/sympy,yashsharan/sympy,Davidjohnwilson/sympy,abloomston/sympy,rahuldan/sympy,aktech/sympy,skidzo/sympy,abloomston/sympy,pbrady/sympy,oliverlee/sympy,kaichogami/sympy,grevutiu-gabriel/sympy,Curious72/sympy,emon10005/sympy,skidzo/sympy,Gadal/sympy,atreyv/sympy,jbbskinny/sympy,MechCoder/sympy,liangjiaxing/sympy,jaimahajan1997/sympy,ahhda/sympy,abhiii5459/sympy,kevalds51/sympy,iamutkarshtiwari/sympy,pandeyadarsh/sympy,liangjiaxing/sympy,beni55/sympy,rahuldan/sympy,sunny94/temp,Shaswat27/sympy,iamutkarshtiwari/sympy,ga7g08/sympy,farhaanbukhsh/sympy,madan96/sympy,jbbskinny/sympy,Gadal/sympy,garvitr/sympy,Designist/sympy,AunShiLord/sympy,MechCoder/sympy,kaushik94/sympy,ga7g08/sympy,pbrady/sympy,souravsingh/sympy,chaffra/sympy,Titan-C/sympy,diofant/diofant,grevutiu-gabriel/sympy,sampadsaha5/sympy,yashsharan/sympy,kumarkrishna/sympy,madan96/sympy,souravsingh/sympy,yukoba/sympy,beni55/sympy,asm666/sympy,jamesblunt/sympy,moble/sympy,jaimahajan1997/sympy,toolforger/sympy,shikil/sympy,Sumith1896/sympy,hrashk/sympy,yukoba/sympy,cswiercz/sympy,cccfran/sympy,VaibhavAgarwalVA/sympy,vipulroxx/sympy,dqnykamp/sympy,mcdaniel67/sympy,hargup/sympy,jbbskinny/sympy,amitjamadagni/sympy,cswiercz/sympy,ahhda/sympy,wyom/sympy,wanglongqi/sympy,oliverlee/sympy,jamesblunt/sympy,yashsharan/sympy,emon10005/sympy,vipulroxx/sympy,hrashk/sympy,Vishluck/sympy,saurabhjn76/sympy,cccfran/sympy,lidavidm/sympy,jamesblunt/sympy,souravsingh/sympy,dqnykamp/sympy,flacjacket/sympy,AkademieOlympia/sympy,pandeyadarsh/sympy,kaushik94/sympy,Curious72/sympy,postvakje/sympy,lindsayad/sympy,Mitchkoens/sympy,kumarkrishna/sympy,jaimahajan1997/sympy,shipci/sympy,bukzor/sympy,drufat/sympy,cswiercz/sympy,iamutkarshtiwari/sympy,asm666/sympy,farhaanbukhsh/sympy,kevalds51/sympy,kmacinnis/sympy,VaibhavAgarwalVA/sympy,sahmed95/sympy,ChristinaZografou/sympy,kaichogami/sympy,vipulroxx/sympy,MridulS/sympy,lidavidm/sympy,rahuldan/sympy,jerli/sympy,dqnykamp/sympy,ahhda/sympy,srjoglekar246/sympy,sunny94/temp,ChristinaZografou/sympy,asm666/sympy,skirpichev/omg,beni55/sympy,sunny94/temp,Designist/sympy,MridulS/sympy,Sumith1896/sympy,cccfran/sympy,garvitr/sympy,Davidjohnwilson/sympy,liangjiaxing/sympy,Shaswat27/sympy,madan96/sympy,mafiya69/sympy,aktech/sympy,debugger22/sympy,jerli/sympy,hrashk/sympy,AunShiLord/sympy,MechCoder/sympy,Arafatk/sympy,toolforger/sympy,oliverlee/sympy,atreyv/sympy,MridulS/sympy,Curious72/sympy,Titan-C/sympy,shikil/sympy,wyom/sympy,ga7g08/sympy,garvitr/sympy,atsao72/sympy,toolforger/sympy,kmacinnis/sympy,hargup/sympy,saurabhjn76/sympy,maniteja123/sympy,Designist/sympy,Gadal/sympy,sampadsaha5/sympy,mafiya69/sympy,kmacinnis/sympy,sahmed95/sympy,kevalds51/sympy,mafiya69/sympy,grevutiu-gabriel/sympy,atreyv/sympy,wanglongqi/sympy,Mitchkoens/sympy,shikil/sympy,Mitchkoens/sympy,Vishluck/sympy,moble/sympy,pandeyadarsh/sympy,wyom/sympy,Arafatk/sympy,lidavidm/sympy,shipci/sympy,jerli/sympy,meghana1995/sympy,sahilshekhawat/sympy,maniteja123/sympy,wanglongqi/sympy,AkademieOlympia/sympy,Sumith1896/sympy,Davidjohnwilson/sympy,hargup/sympy,drufat/sympy,abhiii5459/sympy,aktech/sympy,Shaswat27/sympy,abhiii5459/sympy,amitjamadagni/sympy,yukoba/sympy,pbrady/sympy,chaffra/sympy,chaffra/sympy,meghana1995/sympy,bukzor/sympy,sahilshekhawat/sympy,meghana1995/sympy,debugger22/sympy,emon10005/sympy,postvakje/sympy,sahmed95/sympy,kaushik94/sympy,Titan-C/sympy,abloomston/sympy,Arafatk/sympy