add plugin traversal/visitor method changes to changelog
add plugin traversal/visitor method changes to changelog

jchip/babel,garyjN7/babel,hulkish/babel,lxe/babel,hzoo/babel,shuhei/babel,douglasduteil/babel,DmitrySoshnikov/babel,guybedford/babel,guybedford/babel,Industrial/babel,vhf/babel,DmitrySoshnikov/babel,kellyselden/babel,drieks/babel,Mark-Simulacrum/babel,maurobringolf/babel,douglasduteil/babel,kpdecker/babel,maurobringolf/babel,shuhei/babel,jridgewell/babel,dekelcohen/babel,samwgoldman/babel,claudiopro/babel,chicoxyzzy/babel,kedromelon/babel,mrtrizer/babel,mgcrea/babel,jeffmo/babel,shuhei/babel,iamchenxin/babel,CrocoDillon/babel,jridgewell/babel,mgcrea/babel,STRML/babel,kassens/babel,ameyms/babel,rmacklin/babel,Skillupco/babel,chicoxyzzy/babel,kpdecker/babel,KunGha/babel,benjamn/babel,jeffmo/babel,claudiopro/babel,hulkish/babel,KunGha/babel,ameyms/babel,claudiopro/babel,Skillupco/babel,kellyselden/babel,mgcrea/babel,jhen0409/babel,existentialism/babel,hzoo/babel,jridgewell/babel,zenparsing/babel,zjmiller/babel,bcoe/babel,babel/babel,CrocoDillon/babel,zjmiller/babel,existentialism/babel,tikotzky/babel,tikotzky/babel,antn/babel,babel/babel,AgentME/babel,Mark-Simulacrum/babel,samwgoldman/babel,kaicataldo/babel,hulkish/babel,PolymerLabs/babel,Industrial/babel,krasimir/babel,hzoo/babel,lxe/babel,Skillupco/babel,hulkish/babel,fabiomcosta/babel,iamchenxin/babel,guybedford/babel,babel/babel,bcoe/babel,babel/babel,PolymerLabs/babel,vhf/babel,kassens/babel,douglasduteil/babel,existentialism/babel,dekelcohen/babel,chicoxyzzy/babel,jchip/babel,garyjN7/babel,drieks/babel,mrtrizer/babel,kedromelon/babel,hzoo/babel,AgentME/babel,STRML/babel,kedromelon/babel,chicoxyzzy/babel,krasimir/babel,jhen0409/babel,ccschneidr/babel,kaicataldo/babel,benjamn/babel,iamstarkov/babel,zertosh/babel,zertosh/babel,jeffmo/babel,PolymerLabs/babel,kellyselden/babel,kaicataldo/babel,kellyselden/babel,Skillupco/babel,fabiomcosta/babel,antn/babel,ccschneidr/babel,iamstarkov/babel,Mark-Simulacrum/babel,samwgoldman/babel,kaicataldo/babel,vadzim/babel,maurobringolf/babel,vadzim/babel,rmacklin/babel,zenparsing/babel,iamchenxin/babel,dustyjewett/babel-plugin-transform-es2015-modules-commonjs-ember,drieks/babel,jridgewell/babel