on OSX homebrew based installer can be a one-liner

[zed.rb](https://github.com/caskroom/homebrew-cask/commit/f8bcac30508ba4ae7653fed1149c03233aaf677d#diff-0da0fc34a586791c278c449ab23990a6) got updated to version 1.0.0
Merge pull request #2 from lalyos/patch-2

on OSX homebrew based installer can be a one-liner