Merge pull request #1588 from mattbrictson/airbrussh-in-readme

Add Airbrussh to list of related repos in README

Author: mikejohn857

README.md

@@ -181,6 +181,7 @@ Related GitHub repositories:
 * [capistrano/sshkit](https://github.com/capistrano/sshkit) provides the SSH behavior that underlies Capistrano (when you use `execute` in a Capistrano task, you are using SSHKit)
 * [capistrano/documentation](https://github.com/capistrano/documentation) is what generates the official Capistrano website
 * [capistrano/rails](https://github.com/capistrano/rails) is a very popular gem that adds Ruby on Rails deployment tasks
+* [mattbrictson/airbrussh](https://github.com/mattbrictson/airbrussh) provides Capistrano's default log formatting
 
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