Add cookbook version badge and use the retina compatible travis badge
Add cookbook version badge and use the retina compatible travis badge


Former-commit-id: 5f05d441677b1a54634647dcbd96d549709b704e
Webtrends/rundeck,nilroy/rundeck,nilroy/rundeck,scottymarshall/rundeck,Webtrends/rundeck,nilroy/rundeck,scottymarshall/rundeck,scottymarshall/rundeck,Webtrends/rundeck