Add opt-in Google Analytics.
Add opt-in Google Analytics.

Add the first Google Analytics usage to monitor the command names that
are run by Homebrew.

aw1621107/brew,mgrimes/brew,bfontaine/brew,nandub/brew,AnastasiaSulyagina/brew,gregory-nisbet/brew,mistydemeo/homebrew,mistydemeo/homebrew,mistydemeo/homebrew,Linuxbrew/brew,claui/brew,zmwangx/brew,mgrimes/brew,staticfloat/brew,sjackman/homebrew,maxim-belkin/brew,bfontaine/brew,maxim-belkin/brew,zmwangx/brew,mahori/brew,toonetown/homebrew,toonetown/homebrew,JCount/brew,hanxue/linuxbrew,nandub/brew,tonyg/homebrew,sjackman/homebrew,JCount/brew,JCount/brew,konqui/brew,DomT4/brew,palxex/brew,ilovezfs/brew,Linuxbrew/brew,konqui/brew,mgrimes/brew,DomT4/brew,reitermarkus/brew,rwhogg/brew,DomT4/brew,Linuxbrew/brew,konqui/brew,gregory-nisbet/brew,staticfloat/brew,maxim-belkin/brew,reitermarkus/brew,JCount/brew,AnastasiaSulyagina/brew,pseudocody/brew,vitorgalvao/brew,reelsense/brew,claui/brew,tonyg/homebrew,AnastasiaSulyagina/brew,DomT4/brew,palxex/brew,jmsundar/brew,hanxue/linuxbrew,palxex/brew,EricFromCanada/brew,tonyg/homebrew,muellermartin/dist,amar-laksh/brew_sudo,MikeMcQuaid/brew,vitorgalvao/brew,nandub/brew,alyssais/brew,amar-laksh/brew_sudo,amar-laksh/brew_sudo,MikeMcQuaid/brew,Homebrew/brew,vitorgalvao/brew,gregory-nisbet/brew,jmsundar/brew,konqui/brew,mahori/brew,vitorgalvao/brew,zmwangx/brew,muellermartin/dist,hanxue/linuxbrew,reitermarkus/brew,jmsundar/brew,Homebrew/brew,EricFromCanada/brew,mahori/brew,nandub/brew,reelsense/brew,claui/brew,toonetown/homebrew,pseudocody/brew,rwhogg/brew,sjackman/homebrew,reelsense/brew,rwhogg/brew,sjackman/homebrew,bfontaine/brew,alyssais/brew,gordonmcshane/homebrew,aw1621107/brew,gordonmcshane/homebrew,reitermarkus/brew,Linuxbrew/brew,claui/brew,aw1621107/brew,Homebrew/brew,EricFromCanada/brew,gordonmcshane/homebrew,muellermartin/dist,ilovezfs/brew,alyssais/brew,ilovezfs/brew,mahori/brew,MikeMcQuaid/brew,staticfloat/brew,Homebrew/brew,pseudocody/brew,EricFromCanada/brew,MikeMcQuaid/brew