Added docstrings to matrices.py (still some are missing).
Added docstrings to matrices.py (still some are missing).

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