Re-enable matplotlib printing in init_printing
Re-enable matplotlib printing in init_printing

Re-enable matplotlib as a possible way to png render latex. This
addresses some problems with Windows where using external rendering is
slow and flashes up batch windows. This option is specified through
use_latex by passing 'matplotlib'.

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