README.md in closure_tree-4.2.0 vs README.md in closure_tree-4.2.1

@@ -6,10 +6,11 @@
 and tracking user referrals.
 
 [![Build Status](https://secure.travis-ci.org/mceachen/closure_tree.png?branch=master)](http://travis-ci.org/mceachen/closure_tree)
 [![Gem Version](https://badge.fury.io/rb/closure_tree.png)](http://rubygems.org/gems/closure_tree)
 [![Code Climate](https://codeclimate.com/github/mceachen/closure_tree.png)](https://codeclimate.com/github/mceachen/closure_tree)
+[![Coverage Status](https://coveralls.io/repos/mceachen/closure_tree/badge.png?branch=master)](https://coveralls.io/r/mceachen/closure_tree?branch=master)
 
 Substantially more efficient than
 [ancestry](https://github.com/stefankroes/ancestry) and
 [acts_as_tree](https://github.com/amerine/acts_as_tree), and even more
 awesome than [awesome_nested_set](https://github.com/collectiveidea/awesome_nested_set/),
@@ -469,17 +470,22 @@
 [known issue](https://github.com/rails/rails/issues/7538).
 
 
 ## Change log
 
+### 4.2.1
+
+* Deleting from NumericDeterministicOrdering doesn't create sort order gaps anymore.
+
 ### 4.2.0
 
 * Added ```with_ancestor(*ancestors)```. Thanks for the idea, [Matt](https://github.com/mgornick)!
 * Applied [Leonel Galan](https://github.com/leonelgalan)'s fix for Strong Attribute support
 * ```find_or_create_by``` now uses passed-in attributes as both selection and creation criteria.
   Thanks for the help, [Judd Blair](https://github.com/juddblair)!
   **Please note that this changes prior behavior—test your code with this new version!**
 * ```ct_advisory_lock``` was moved into the ```_ct``` support class, to reduce model method pollution
+* Moved a bunch of code into more focused piles of module mixins
 
 ### 4.1.0
 
 * Added support for Rails 4.0.0.rc1 and Ruby 2.0.0 (while maintaining backward compatibility with Rails 3, BOOYA)
 * Added ```#to_dot_digraph```, suitable for Graphviz rendering