Change absolute paths in ntheory.txt to relative paths.
Change absolute paths in ntheory.txt to relative paths.

This way in See Also section one can reference objects just by their name (objname)
instead of the full path (path.to.objname). This makes the section
more readable.

``smoothness`` and ``smoothness_p`` must use absolute paths, because they are not
imported into global namspace in ntheory's ``__init__()``.

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