Merge pull request #1242 from reitermarkus/cask-docs

Library/Homebrew/cask/CONDUCT.md

Library/Homebrew/cask/CONTRIBUTING.md

Library/Homebrew/cask/README.md

Library/Homebrew/cask/USAGE.md

.../Homebrew/cask/doc/cask_language_reference/all_stanzas.md

Library/Homebrew/cask/doc/cask_language_reference/readme.md

.../Homebrew/cask/doc/cask_language_reference/stanzas/app.md

...ebrew/cask/doc/cask_language_reference/stanzas/appcast.md

...ebrew/cask/doc/cask_language_reference/stanzas/caveats.md

...ask/doc/cask_language_reference/stanzas/conflicts_with.md

...ew/cask/doc/cask_language_reference/stanzas/depends_on.md

...mebrew/cask/doc/cask_language_reference/stanzas/flight.md

.../Homebrew/cask/doc/cask_language_reference/stanzas/gpg.md

...rew/cask/doc/cask_language_reference/stanzas/installer.md

...Homebrew/cask/doc/cask_language_reference/stanzas/name.md

.../Homebrew/cask/doc/cask_language_reference/stanzas/pkg.md

...mebrew/cask/doc/cask_language_reference/stanzas/sha256.md

...omebrew/cask/doc/cask_language_reference/stanzas/suite.md

...rew/cask/doc/cask_language_reference/stanzas/uninstall.md

.../Homebrew/cask/doc/cask_language_reference/stanzas/url.md