added one-liner (like mon)

Author: matthewmueller

README.md

@@ -6,6 +6,10 @@ mongroup is a wrapper for [mon](https://github.com/visionmedia/mon/).  It allows
 
 	make install
 
+One-liner:
+
+	(mkdir /tmp/mongroup && cd /tmp/mongroup && curl -L# https://github.com/jgallen23/mongroup/archive/master.tar.gz | tar zx --strip 1 && make install)
+
 ## Usage
 
 	Usage: mongroup [options] [command]