Update README.md

Added travis-ci status image

Author: Marc Rooding

README.md

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 # gulp-protractor-cucumber-html-report
 
+[![Build Status](https://travis-ci.org/mrooding/gulp-protractor-cucumber-html-report.svg?branch=master)](https://travis-ci.org/mrooding/gulp-protractor-cucumber-html-report)
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 > Generate html report from JSON file returned by CucumberJS json formatter
 
 This is a stand-alone fork of [grunt-protractor-cucumber-html-report](https://github.com/robhil/grunt-protractor-cucumber-html-report)
@@ -127,4 +129,4 @@ Copyright for portions of project [gulp-protractor-cucumber-html-report](https:/
 
 0.0.5:
   - More robust creation of the output directory [thanks smuldr!](https://github.com/smuldr)
-  - Fixed the HTML reporter when using multiple feature files
+  - Fixed the HTML reporter when using multiple feature files