My changes to add links to the currently running slave node in the dashboard.  Some notes:
- There are 2 new service methods.  runningNodeVNCLink returns html and uses data-ng-bind-html-unsafe directive in the page because angular does auto sanitizing of URLs for cross-site scripting/security et al
- The actual values (ip address, name) come from environment variables set by the ssh slave plugin I believe.  The link for the master node is essentially hardcoded.
- The original blame feature is disabled (shouldIndicateCulprits always returns false)
- The corresponding blame tests were disabled with @Ignore