Implemented interactive.init_ipython()
Implemented interactive.init_ipython()

Added code to setup IPython session outside
isympy, eg. for ipython -p sympy

init_ipython() functionality:

[1] Startup (Welcome) banner

  [1a] Python version
  [1b] SymPy version
  [1c] Caching (optional)

[2] Display hook (pretty-printer)

[3] Exit message

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