Update readme with build link

Author: jrpatterson

README.md

@@ -1,8 +1,8 @@
 # EtdaUtilities
 
-Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/etda_utilities`. To experiment with that code, run `bin/console` for an interactive prompt.
+[![Build Status](https://travis-ci.com/psu-stewardship/etda_utilities.svg?token=aQpbqAxsm8KshbvyB24o&branch=master)](https://travis-ci.com/psu-stewardship/etda_utilities)
 
-TODO: Delete this and the text above, and describe your gem
+Common methods used by etda_workflow and etda_explore
 
 ## Installation