Update docs for clarity

README.md

@@ -9,7 +9,7 @@ Neural Networks in `ruby`
 
 [![Gem Version](https://badge.fury.io/rb/ruby-fann.png)](http://badge.fury.io/rb/ruby-fann)
 
-RubyFann, or "ruby-fann" is a ruby gem that binds to FANN (Fast Artificial Neural Network) from within a ruby/rails environment.  FANN is a is a free (native) open source neural network library, which implements multilayer artificial neural networks, supporting both fully-connected and sparsely-connected networks.  It is easy to use, versatile, well documented, and fast.  `RubyFann` makes working with neural networks a breeze using `ruby`, with the added benefit that most of the heavy lifting is done natively.
+RubyFann, or "ruby-fann" is a Ruby Gem (no Rails required) that binds to FANN (Fast Artificial Neural Network) from within a ruby/rails environment.  FANN is a is a free native open source neural network library, which implements multilayer artificial neural networks, supporting both fully-connected and sparsely-connected networks.  It is easy to use, versatile, well documented, and fast.  `RubyFann` makes working with neural networks a breeze using `ruby`, with the added benefit that most of the heavy lifting is done natively.
 
 A talk given by our friend Ethan from Big-Oh Studios at Lone Star Ruby 2013: http://confreaks.com/videos/2609-lonestarruby2013-neural-networks-with-rubyfann