Add introduction and section about polyfills to ecmascript README.
Add introduction and section about polyfills to ecmascript README.

mjmasn/meteor,paul-barry-kenzan/meteor,wmkcc/meteor,chmac/meteor,meteor-velocity/meteor,lawrenceAIO/meteor,yonas/meteor-freebsd,michielvanoeffelen/meteor,steedos/meteor,aldeed/meteor,mjmasn/meteor,4commerce-technologies-AG/meteor,lassombra/meteor,akintoey/meteor,cog-64/meteor,kencheung/meteor,mirstan/meteor,shrop/meteor,codedogfish/meteor,paul-barry-kenzan/meteor,lorensr/meteor,DCKT/meteor,guazipi/meteor,Quicksteve/meteor,sclausen/meteor,shmiko/meteor,mjmasn/meteor,kencheung/meteor,dandv/meteor,framewr/meteor,mirstan/meteor,kencheung/meteor,guazipi/meteor,akintoey/meteor,iman-mafi/meteor,shrop/meteor,meteor-velocity/meteor,DCKT/meteor,IveWong/meteor,wmkcc/meteor,hristaki/meteor,shrop/meteor,kencheung/meteor,colinligertwood/meteor,namho102/meteor,Quicksteve/meteor,dev-bobsong/meteor,Prithvi-A/meteor,mirstan/meteor,IveWong/meteor,IveWong/meteor,cog-64/meteor,neotim/meteor,EduShareOntario/meteor,meonkeys/meteor,DAB0mB/meteor,4commerce-technologies-AG/meteor,mirstan/meteor,yyx990803/meteor,henrypan/meteor,cog-64/meteor,meonkeys/meteor,IveWong/meteor,steedos/meteor,sclausen/meteor,justintung/meteor,johnthepink/meteor,justintung/meteor,dev-bobsong/meteor,DCKT/meteor,chasertech/meteor,PatrickMcGuinness/meteor,dev-bobsong/meteor,lpinto93/meteor,shmiko/meteor,Urigo/meteor,justintung/meteor,wmkcc/meteor,steedos/meteor,chmac/meteor,yyx990803/meteor,Quicksteve/meteor,paul-barry-kenzan/meteor,meteor-velocity/meteor,guazipi/meteor,meteor-velocity/meteor,DAB0mB/meteor,jdivy/meteor,dev-bobsong/meteor,Hansoft/meteor,framewr/meteor,Puena/meteor,neotim/meteor,yonas/meteor-freebsd,newswim/meteor,dandv/meteor,DAB0mB/meteor,yiliaofan/meteor,henrypan/meteor,shmiko/meteor,chmac/meteor,dandv/meteor,shmiko/meteor,shmiko/meteor,guazipi/meteor,Prithvi-A/meteor,wmkcc/meteor,aramk/meteor,guazipi/meteor,devgrok/meteor,meonkeys/meteor,colinligertwood/meteor,newswim/meteor,mjmasn/meteor,framewr/meteor,EduShareOntario/meteor,yiliaofan/meteor,michielvanoeffelen/meteor,codedogfish/meteor,lawrenceAIO/meteor,jdivy/meteor,lassombra/meteor,vacjaliu/meteor,chasertech/meteor,nuvipannu/meteor,Paulyoufu/meteor-1,namho102/meteor,Hansoft/meteor,guazipi/meteor,Urigo/meteor,akintoey/meteor,newswim/meteor,nuvipannu/meteor,framewr/meteor,Prithvi-A/meteor,sclausen/meteor,mjmasn/meteor,yyx990803/meteor,aramk/meteor,vacjaliu/meteor,yonas/meteor-freebsd,newswim/meteor,AnthonyAstige/meteor,codedogfish/meteor,steedos/meteor,henrypan/meteor,EduShareOntario/meteor,colinligertwood/meteor,chmac/meteor,calvintychan/meteor,yiliaofan/meteor,namho102/meteor,lawrenceAIO/meteor,Quicksteve/meteor,vacjaliu/meteor,framewr/meteor,aramk/meteor,michielvanoeffelen/meteor,steedos/meteor,DAB0mB/meteor,yyx990803/meteor,Quicksteve/meteor,yyx990803/meteor,lorensr/meteor,calvintychan/meteor,guazipi/meteor,codedogfish/meteor,akintoey/meteor,yinhe007/meteor,vacjaliu/meteor,DCKT/meteor,calvintychan/meteor,paul-barry-kenzan/meteor,yonas/meteor-freebsd,vacjaliu/meteor,lawrenceAIO/meteor,aramk/meteor,newswim/meteor,Quicksteve/meteor,michielvanoeffelen/meteor,4commerce-technologies-AG/meteor,lawrenceAIO/meteor,yiliaofan/meteor,benstoltz/meteor,colinligertwood/meteor,framewr/meteor,chmac/meteor,Hansoft/meteor,lpinto93/meteor,hristaki/meteor,yinhe007/meteor,nuvipannu/meteor,namho102/meteor,Quicksteve/meteor,chasertech/meteor,newswim/meteor,benstoltz/meteor,AnthonyAstige/meteor,IveWong/meteor,devgrok/meteor,hristaki/meteor,jdivy/meteor,michielvanoeffelen/meteor,iman-mafi/meteor,yiliaofan/meteor,iman-mafi/meteor,newswim/meteor,AnthonyAstige/meteor,calvintychan/meteor,iman-mafi/meteor,nuvipannu/meteor,neotim/meteor,justintung/meteor,mirstan/meteor,framewr/meteor,jdivy/meteor,Paulyoufu/meteor-1,calvintychan/meteor,yiliaofan/meteor,dandv/meteor,jdivy/meteor,neotim/meteor,wmkcc/meteor,chasertech/meteor,cog-64/meteor,vacjaliu/meteor,chasertech/meteor,Paulyoufu/meteor-1,lassombra/meteor,yonas/meteor-freebsd,Puena/meteor,Paulyoufu/meteor-1,Urigo/meteor,chmac/meteor,yinhe007/meteor,aldeed/meteor,Paulyoufu/meteor-1,devgrok/meteor,colinligertwood/meteor,paul-barry-kenzan/meteor,DAB0mB/meteor,aldeed/meteor,yonas/meteor-freebsd,meonkeys/meteor,johnthepink/meteor,devgrok/meteor,benstoltz/meteor,chasertech/meteor,Puena/meteor,Hansoft/meteor,johnthepink/meteor,paul-barry-kenzan/meteor,Puena/meteor,aldeed/meteor,steedos/meteor,paul-barry-kenzan/meteor,yyx990803/meteor,benstoltz/meteor,PatrickMcGuinness/meteor,steedos/meteor,chasertech/meteor,lpinto93/meteor,Urigo/meteor,AnthonyAstige/meteor,mjmasn/meteor,4commerce-technologies-AG/meteor,Urigo/meteor,lassombra/meteor,justintung/meteor,kencheung/meteor,yinhe007/meteor,aramk/meteor,calvintychan/meteor,lorensr/meteor,kencheung/meteor,neotim/meteor,Prithvi-A/meteor,lpinto93/meteor,calvintychan/meteor,lorensr/meteor,shmiko/meteor,DCKT/meteor,aramk/meteor,dev-bobsong/meteor,nuvipannu/meteor,henrypan/meteor,Hansoft/meteor,iman-mafi/meteor,Prithvi-A/meteor,vacjaliu/meteor,EduShareOntario/meteor,lpinto93/meteor,devgrok/meteor,yinhe007/meteor,yyx990803/meteor,michielvanoeffelen/meteor,Urigo/meteor,johnthepink/meteor,henrypan/meteor,DAB0mB/meteor,lassombra/meteor,johnthepink/meteor,Paulyoufu/meteor-1,benstoltz/meteor,aldeed/meteor,akintoey/meteor,mirstan/meteor,justintung/meteor,EduShareOntario/meteor,PatrickMcGuinness/meteor,sclausen/meteor,chmac/meteor,cog-64/meteor,lorensr/meteor,colinligertwood/meteor,shrop/meteor,Paulyoufu/meteor-1,wmkcc/meteor,4commerce-technologies-AG/meteor,dandv/meteor,akintoey/meteor,DCKT/meteor,EduShareOntario/meteor,Puena/meteor,shrop/meteor,hristaki/meteor,sclausen/meteor,meteor-velocity/meteor,mirstan/meteor,johnthepink/meteor,codedogfish/meteor,sclausen/meteor,cog-64/meteor,mjmasn/meteor,devgrok/meteor,hristaki/meteor,shrop/meteor,jdivy/meteor,kencheung/meteor,IveWong/meteor,namho102/meteor,iman-mafi/meteor,aldeed/meteor,yiliaofan/meteor,meonkeys/meteor,akintoey/meteor,Prithvi-A/meteor,lawrenceAIO/meteor,AnthonyAstige/meteor,Hansoft/meteor,lassombra/meteor,PatrickMcGuinness/meteor,hristaki/meteor,AnthonyAstige/meteor,justintung/meteor,cog-64/meteor,yonas/meteor-freebsd,lpinto93/meteor,yinhe007/meteor,dandv/meteor,devgrok/meteor,DAB0mB/meteor,aramk/meteor,neotim/meteor,iman-mafi/meteor,meonkeys/meteor,Prithvi-A/meteor,colinligertwood/meteor,AnthonyAstige/meteor,IveWong/meteor,meonkeys/meteor,wmkcc/meteor,nuvipannu/meteor,lorensr/meteor,henrypan/meteor,shrop/meteor,EduShareOntario/meteor,Puena/meteor,benstoltz/meteor,meteor-velocity/meteor,hristaki/meteor,neotim/meteor,Puena/meteor,DCKT/meteor,henrypan/meteor,PatrickMcGuinness/meteor,meteor-velocity/meteor,aldeed/meteor,lpinto93/meteor,benstoltz/meteor,sclausen/meteor,lorensr/meteor,michielvanoeffelen/meteor,codedogfish/meteor,PatrickMcGuinness/meteor,AnthonyAstige/meteor,4commerce-technologies-AG/meteor,yinhe007/meteor,Hansoft/meteor,lawrenceAIO/meteor,dev-bobsong/meteor,4commerce-technologies-AG/meteor,namho102/meteor,Urigo/meteor,shmiko/meteor,jdivy/meteor,dandv/meteor,johnthepink/meteor,PatrickMcGuinness/meteor,nuvipannu/meteor,namho102/meteor,dev-bobsong/meteor,lassombra/meteor,codedogfish/meteor