Added code for series_reversion from Mario's PR 609
Added code for series_reversion from Mario's PR 609

garvitr/sympy,wyom/sympy,Arafatk/sympy,shikil/sympy,shikil/sympy,skidzo/sympy,pandeyadarsh/sympy,lindsayad/sympy,mcdaniel67/sympy,Arafatk/sympy,atreyv/sympy,hargup/sympy,jerli/sympy,oliverlee/sympy,jaimahajan1997/sympy,VaibhavAgarwalVA/sympy,debugger22/sympy,oliverlee/sympy,jerli/sympy,jbbskinny/sympy,saurabhjn76/sympy,kevalds51/sympy,mcdaniel67/sympy,kumarkrishna/sympy,abhiii5459/sympy,Gadal/sympy,farhaanbukhsh/sympy,asm666/sympy,Vishluck/sympy,saurabhjn76/sympy,VaibhavAgarwalVA/sympy,toolforger/sympy,kevalds51/sympy,Designist/sympy,kevalds51/sympy,madan96/sympy,Vishluck/sympy,yashsharan/sympy,iamutkarshtiwari/sympy,moble/sympy,maniteja123/sympy,Curious72/sympy,garvitr/sympy,postvakje/sympy,abhiii5459/sympy,Curious72/sympy,MechCoder/sympy,garvitr/sympy,mafiya69/sympy,chaffra/sympy,rahuldan/sympy,emon10005/sympy,chaffra/sympy,souravsingh/sympy,ahhda/sympy,sampadsaha5/sympy,pandeyadarsh/sympy,atreyv/sympy,AkademieOlympia/sympy,kaichogami/sympy,pandeyadarsh/sympy,wanglongqi/sympy,Shaswat27/sympy,aktech/sympy,wyom/sympy,VaibhavAgarwalVA/sympy,kaushik94/sympy,jbbskinny/sympy,Gadal/sympy,toolforger/sympy,atsao72/sympy,lindsayad/sympy,kaichogami/sympy,iamutkarshtiwari/sympy,souravsingh/sympy,Davidjohnwilson/sympy,aktech/sympy,maniteja123/sympy,cswiercz/sympy,Designist/sympy,kaushik94/sympy,emon10005/sympy,iamutkarshtiwari/sympy,AkademieOlympia/sympy,sampadsaha5/sympy,yukoba/sympy,grevutiu-gabriel/sympy,sahmed95/sympy,Arafatk/sympy,Vishluck/sympy,cswiercz/sympy,wanglongqi/sympy,moble/sympy,moble/sympy,yukoba/sympy,jaimahajan1997/sympy,wyom/sympy,bukzor/sympy,bukzor/sympy,yashsharan/sympy,abhiii5459/sympy,madan96/sympy,Titan-C/sympy,ahhda/sympy,Davidjohnwilson/sympy,kumarkrishna/sympy,chaffra/sympy,maniteja123/sympy,Designist/sympy,grevutiu-gabriel/sympy,Shaswat27/sympy,sahmed95/sympy,asm666/sympy,hargup/sympy,rahuldan/sympy,farhaanbukhsh/sympy,ChristinaZografou/sympy,grevutiu-gabriel/sympy,cswiercz/sympy,Titan-C/sympy,ga7g08/sympy,drufat/sympy,Curious72/sympy,oliverlee/sympy,emon10005/sympy,hargup/sympy,skidzo/sympy,Gadal/sympy,farhaanbukhsh/sympy,postvakje/sympy,saurabhjn76/sympy,madan96/sympy,ga7g08/sympy,MechCoder/sympy,mafiya69/sympy,kumarkrishna/sympy,drufat/sympy,asm666/sympy,aktech/sympy,jaimahajan1997/sympy,sampadsaha5/sympy,lindsayad/sympy,Titan-C/sympy,postvakje/sympy,ahhda/sympy,mcdaniel67/sympy,kaichogami/sympy,jerli/sympy,debugger22/sympy,yashsharan/sympy,wanglongqi/sympy,rahuldan/sympy,kaushik94/sympy,AkademieOlympia/sympy,sahmed95/sympy,ChristinaZografou/sympy,atsao72/sympy,toolforger/sympy,bukzor/sympy,yukoba/sympy,MechCoder/sympy,souravsingh/sympy,atreyv/sympy,jbbskinny/sympy,atsao72/sympy,drufat/sympy,debugger22/sympy,shikil/sympy,Davidjohnwilson/sympy,mafiya69/sympy,skidzo/sympy,Shaswat27/sympy,ga7g08/sympy,ChristinaZografou/sympy