README.md in ruby-units-2.1.0 vs README.md in ruby-units-2.2.0

@@ -5,10 +5,17 @@
 
 Kevin C. Olbrich, Ph.D.
 
 Project page: [http://github.com/olbrich/ruby-units](http://github.com/olbrich/ruby-units)
 
+Notes
+-----
+
+This version removes 'mathn' as a dependency.  Mathn alters the behavior of some mathematical operators, which
+frequently causes unexpected behavior and can be a source of difficult to diagnose bugs.  Mathn is also scheduled to be removed from
+the Ruby standard library.
+
 Introduction
 ------------
 
 Many technical applications make use of specialized calculations at some point. Frequently, these calculations require unit conversions to ensure accurate results. Needless to say, this is a pain to properly keep track of, and is prone to numerous errors.
 
@@ -273,19 +280,9 @@
 
 1. separator (true/false): should a space be used to separate the scalar from the unit part during output.
 
 
 ### NOTES
-
-#### Mathn
-
-Note that the current implementation of ruby-units requires 'mathn' from the ruby standard library.
-This tends to change the behavior of integer math in ways that many people do not expect, and can be the source
-of numerous bugs and odd behaviors.  If you encounter what appears to be a bug in your code that seems to be related
-
-to the use of ruby-units, try to reproduce the bug by just including 'mathn' by itself.
-
-If you identify a bug in a gem or code that uses mathn, please file a bug report or create a pull request to fix it.
 
 #### Performance vs. Accuracy
 
 Ruby units was originally intended to provide a robust and accurate way to do arbitrary unit conversions.  
 In some cases, these conversions can result in the creation and garbage collection of a lot of intermediate objects during