Add bullet for spring-commands-m

Author: gabrieljoelc

README.md

@@ -227,6 +227,7 @@ You can add these to your Gemfile for additional commands:
   running `Test::Unit` tests on Rails 3, since only Rails 4 allows you
   to use `rake test path/to/test` to run a particular test/directory.
 * [spring-commands-teaspoon](https://github.com/alejandrobabio/spring-commands-teaspoon.git)
+* [spring-commands-m](https://github.com/gabrieljoelc/spring-commands-m.git)
 
 ## Use without adding to bundle