Merge branch 'master' of github.com:Homebrew/brew into update-compiler-docs

.travis.yml

Library/Homebrew/brew.sh

Library/Homebrew/cask/lib/hbc/audit.rb

Library/Homebrew/cmd/tap-info.rb

Library/Homebrew/config.rb

Library/Homebrew/dev-cmd/audit.rb

Library/Homebrew/dev-cmd/update-test.rb

Library/Homebrew/download_strategy.rb

Library/Homebrew/extend/ENV/shared.rb

Library/Homebrew/extend/ENV/std.rb

Library/Homebrew/extend/ENV/super.rb

Library/Homebrew/formula_installer.rb

Library/Homebrew/formulary.rb

Library/Homebrew/install.rb

Library/Homebrew/resource.rb

Library/Homebrew/rubocops.rb

Library/Homebrew/rubocops/bottle_block_cop.rb

Library/Homebrew/rubocops/components_redundancy_cop.rb

Library/Homebrew/rubocops/options_cop.rb

Library/Homebrew/system_config.rb