Added badges in the README for travis ci, gemnasium, and code climate

README.rdoc

@@ -1,3 +1,7 @@
+{<img src="https://secure.travis-ci.org/rubiety/nilify_blanks.png?branch=master" alt="Build Status" />}[http://travis-ci.org/rubiety/nilify_blanks]
+{<img src="https://gemnasium.com/rubiety/nilify_blanks.png" alt="Dependency Status" />}[https://gemnasium.com/rubiety/nilify_blanks]
+{<img src="https://codeclimate.com/github/rubiety/nilify_blanks.png" />}[https://codeclimate.com/github/rubiety/nilify_blanks]
+
 == Nilify Blanks
 
 In Rails when saving a model from a form and values are not provided by the user, an empty string is recorded to the database instead of a NULL as many would prefer (mixing blanks and NULLs can become confusing).  This plugin allows you to specify a list of attributes (or exceptions from all the attributes) that will be converted to nil if they are blank before a model is saved.