Add --yes option to always answer yes

README.md

@@ -45,6 +45,8 @@ $ installJRMC --help
       The webroot directory to install the repo (default: /var/www/jriver/)
   --createrepo-user USER
       The web server user if different from the current user
+--yes, -y
+    Always assume yes for questions
 --version, -v
     Print this script version and exit
 --debug, -d