README.md in utc_rpn_calc-0.0.1 vs README.md in utc_rpn_calc-0.1.0

@@ -1,9 +1,17 @@
 # UtcRpnCalc
 
-TODO: Write a gem description
+[![Gem Version](https://badge.fury.io/rb/utc_rpn_calc.png)](http://badge.fury.io/rb/utc_rpn_calc)
+[![Build Status](https://travis-ci.org/colinrymer/utc_rpn_calc.png?branch=master)](https://travis-ci.org/colinrymer/utc_rpn_calc)
+[![Coverage Status](https://coveralls.io/repos/colinrymer/utc_rpn_calc/badge.png)](https://coveralls.io/r/colinrymer/utc_rpn_calc)
+[![Code Climate](https://codeclimate.com/github/colinrymer/utc_rpn_calc.png)](https://codeclimate.com/github/colinrymer/utc_rpn_calc)
+[![Dependency Status](https://gemnasium.com/colinrymer/utc_rpn_calc.png)](https://gemnasium.com/colinrymer/utc_rpn_calc)
 
+A simple Reverse Polish Notation (RPN) hexadecimal calculator.
+It was written as a demonstration of the UTC IEEE CS coding challenge
+specifications for February 2014.
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
     gem 'utc_rpn_calc'
@@ -16,14 +24,19 @@
 
     $ gem install utc_rpn_calc
 
 ## Usage
 
-TODO: Write usage instructions here
+Pass a string of digits and operators separated with spaces as command line arguments, e.g.
 
+```
+$ utc_rpn_calc 1 2 +
+0003
+```
+
 ## Contributing
 
-1. Fork it ( http://github.com/<my-github-username>/utc_rpn_calc/fork )
+1. Fork it ( http://github.com/colinrymer/utc_rpn_calc/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)
 4. Push to the branch (`git push origin my-new-feature`)
 5. Create new Pull Request