Gaussian optics module
Gaussian optics module

This commit implements gaussian optics module.
To import use sympy.physics.gaussopt.

It implements
  Ray transfer matrices for geometrical rays and gaussian beams.
  Conjugation relations.

Doctests are present.
Unit tests are not present.

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