Riccardo added to README
Riccardo added to README

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