Slight rewording of README

README.md

-SimpleKit-ruby is a minimalist Ruby library which implements discrete event
+SimpleKit for Ruby is a minimalist implementation of discrete event
 simulation using event graphs.
 
 Copyright (C) 2012-2018  Paul J. Sanchez
@@ -12,12 +12,12 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.**
 
 ### DESCRIPTION
 
-SimpleKit-ruby is a very minimal Ruby implementation of discrete event
-simulation based on Lee Schruben's "Event Graph" approach.  I wrote it
-to illustrate to CS students how simulation works.  You are welcome to
-use it as long as you clearly understand that it was designed as a
-teaching tool.  For serious simulation modeling with event graphs I
-recommend Lee Schruben's SIGMA package or Arnie Buss's SimKit.
+SimpleKit for Ruby is a very minimal Ruby implementation of discrete event
+simulation based on Lee Schruben's "Event Graph" approach.  I wrote it to
+illustrate to CS students how simulation works "under the hood".  You are
+welcome to use it as you wish so long as you clearly understand that it was
+created to be a teaching tool.  For serious simulation modeling with event
+graphs I recommend Lee Schruben's `SIGMA` package or Arnie Buss's `SimKit`.
 
 ### WHAT'S WHAT