Update default ruby_install version to 0.4.1
Workaround for a broken redirect on latest chef

https://tickets.opscode.com/browse/CHEF-5010?focusedCommentId=48183&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-48183
Prevent reinstall of ruby on install action
Merge pull request #6 from brainopia/prevent_reinstall

Prevent reinstall on :install action