Added an entry for ViM's *.swo files to .gitignore
Added an entry for ViM's *.swo files to .gitignore

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