add travis

Author: monkstone

README.md

@@ -1,6 +1,6 @@
 # Ruby Word Cram
 
-[![Gem Version](https://badge.fury.io/rb/ruby_wordcram.svg)](https://badge.fury.io/rb/ruby_wordcram)
+[![Gem Version](https://badge.fury.io/rb/ruby_wordcram.svg)](https://badge.fury.io/rb/ruby_wordcram) [![Travis CI](https://travis-ci.org/ruby-processing/WordCram.svg)](https://travis-ci.org/ruby-processing/WordCram)
 
 A gem wrapper for the WordCram library