Add another link to the resources page

Author: Mike Gunderloy

resources.md

@@ -36,6 +36,7 @@ Philosophy
 * [Ruby Packaging Standard](http://chneukirchen.github.com/rps/)
 * [Why `require 'rubygems'` Is Wrong](http://tomayko.com/writings/require-rubygems-antipattern)
 * [How to Name Gems](http://blog.segment7.net/2010/11/15/how-to-name-gems)
+* [Make the world a better place; put a license in your gemspec](http://www.benjaminfleischer.com/2013/07/12/make-the-world-a-better-place-put-a-license-in-your-gemspec/)
 
 Patterns
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