Modify CONTRIBUTING.md for Linuxbrew
Modify CONTRIBUTING.md for Linuxbrew

Closes #292

brevilo/linuxbrew,tghs/linuxbrew,tbetbetbe/linuxbrew,SuperNEMO-DBD/cadfaelbrew,Linuxbrew/linuxbrew,hyokosdeveloper/linuxbrew,caputomarcos/linuxbrew,Gui13/linuxbrew,Homebrew/linuxbrew,davydden/linuxbrew,Homebrew/linuxbrew,dunn/linuxbrew,tomas/linuxbrew,digiter/linuxbrew,tdsmith/linuxbrew,sublimino/linuxbrew,sjackman/linuxbrew,digiter/linuxbrew,sublimino/linuxbrew,drbenmorgan/linuxbrew,caputomarcos/linuxbrew,SuperNEMO-DBD/cadfaelbrew,IsmailM/linuxbrew,arcivanov/linuxbrew,dunn/linuxbrew,amenk/linuxbrew,LeonB/linuxbrew,jbaum98/linuxbrew,jbaum98/linuxbrew,dholm/linuxbrew,jbaum98/linuxbrew,dunn/linuxbrew,DoomHammer/linuxbrew,bukzor/linuxbrew,DoomHammer/linuxbrew,tbetbetbe/linuxbrew,amenk/linuxbrew,sarvex/linuxbrew,tbetbetbe/linuxbrew,ebouaziz/linuxbrew,saketkc/linuxbrew,SuperNEMO-DBD/cadfaelbrew,princeofdarkness76/linuxbrew,sjackman/linuxbrew,trskop/linuxbrew,saketkc/linuxbrew,lvicentesanchez/linuxbrew,danabrand/linuxbrew,lvicentesanchez/linuxbrew,SuperNEMO-DBD/cadfaelbrew,dholm/linuxbrew,sarvex/linuxbrew,sublimino/linuxbrew,gnubila-france/linuxbrew,saketkc/linuxbrew,drbenmorgan/linuxbrew,Linuxbrew/linuxbrew,tjhei/linuxbrew,romejoe/linuxbrew,saketkc/linuxbrew,gcstang/linuxbrew,Homebrew/linuxbrew,bukzor/linuxbrew,arcivanov/linuxbrew,gnubila-france/linuxbrew,lvicentesanchez/linuxbrew,reelsense/linuxbrew,outcoldman/linuxbrew,danabrand/linuxbrew,sublimino/linuxbrew,princeofdarkness76/linuxbrew,ebouaziz/linuxbrew,Homebrew/linuxbrew,caputomarcos/linuxbrew,tghs/linuxbrew,ebouaziz/linuxbrew,jwillemsen/linuxbrew,gcstang/linuxbrew,Angeldude/linuxbrew,hyokosdeveloper/linuxbrew,drbenmorgan/linuxbrew,tghs/linuxbrew,tghs/linuxbrew,jbaum98/linuxbrew,dunn/linuxbrew,ebouaziz/linuxbrew,gnubila-france/linuxbrew,IsmailM/linuxbrew,sarvex/linuxbrew,adamliter/linuxbrew,brevilo/linuxbrew,afdnlw/linuxbrew,dholm/linuxbrew,arcivanov/linuxbrew,davydden/linuxbrew,davydden/linuxbrew,Angeldude/linuxbrew,Linuxbrew/linuxbrew,tghs/linuxbrew,sjackman/linuxbrew,danabrand/linuxbrew,tdsmith/linuxbrew,Angeldude/linuxbrew,tdsmith/linuxbrew,tomas/linuxbrew,trskop/linuxbrew,adamliter/linuxbrew,afdnlw/linuxbrew,hyokosdeveloper/linuxbrew,reelsense/linuxbrew,hyokosdeveloper/linuxbrew,tdsmith/linuxbrew,tomas/linuxbrew,jack-and-rozz/linuxbrew,romejoe/linuxbrew,LeonB/linuxbrew,tbetbetbe/linuxbrew,reelsense/linuxbrew,adamliter/linuxbrew,jack-and-rozz/linuxbrew,romejoe/linuxbrew,digiter/linuxbrew,IsmailM/linuxbrew,sjackman/linuxbrew,outcoldman/linuxbrew,LeonB/linuxbrew,Gui13/linuxbrew,bukzor/linuxbrew,DoomHammer/linuxbrew,danabrand/linuxbrew,sarvex/linuxbrew,jwillemsen/linuxbrew,afdnlw/linuxbrew,gnubila-france/linuxbrew,outcoldman/linuxbrew,lvicentesanchez/linuxbrew,jack-and-rozz/linuxbrew,trskop/linuxbrew,drbenmorgan/linuxbrew,reelsense/linuxbrew,tdsmith/linuxbrew,tjhei/linuxbrew,tjhei/linuxbrew,digiter/linuxbrew,Gui13/linuxbrew,adamliter/linuxbrew,gcstang/linuxbrew,Linuxbrew/linuxbrew,princeofdarkness76/linuxbrew,davydden/linuxbrew,amenk/linuxbrew,caputomarcos/linuxbrew,bukzor/linuxbrew,afdnlw/linuxbrew,Angeldude/linuxbrew,Gui13/linuxbrew,DoomHammer/linuxbrew,IsmailM/linuxbrew,jwillemsen/linuxbrew,brevilo/linuxbrew,Gui13/linuxbrew,tomas/linuxbrew,amenk/linuxbrew,digiter/linuxbrew