docs/Installation: note curl usage on <=10.7.
docs/Installation: note curl usage on <=10.7.

Need to pass `--insecure` there for it to work.

Homebrew/brew,sjackman/homebrew,nandub/brew,Linuxbrew/brew,vitorgalvao/brew,ilovezfs/brew,vitorgalvao/brew,claui/brew,MikeMcQuaid/brew,claui/brew,mgrimes/brew,mahori/brew,Linuxbrew/brew,claui/brew,nandub/brew,sjackman/homebrew,MikeMcQuaid/brew,konqui/brew,EricFromCanada/brew,claui/brew,DomT4/brew,JCount/brew,mgrimes/brew,Homebrew/brew,mahori/brew,nandub/brew,konqui/brew,EricFromCanada/brew,ilovezfs/brew,ilovezfs/brew,hanxue/linuxbrew,mahori/brew,MikeMcQuaid/brew,maxim-belkin/brew,vitorgalvao/brew,EricFromCanada/brew,hanxue/linuxbrew,konqui/brew,DomT4/brew,Homebrew/brew,DomT4/brew,nandub/brew,maxim-belkin/brew,DomT4/brew,reitermarkus/brew,Homebrew/brew,reitermarkus/brew,JCount/brew,vitorgalvao/brew,reitermarkus/brew,reitermarkus/brew,EricFromCanada/brew,hanxue/linuxbrew,sjackman/homebrew,JCount/brew,mgrimes/brew,JCount/brew,maxim-belkin/brew,konqui/brew,Linuxbrew/brew,mahori/brew,MikeMcQuaid/brew,sjackman/homebrew,Linuxbrew/brew