Add --cache support to hg and bzr.
Add --cache support to hg and bzr.

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