Merge pull request #71 from daniel-beck/performance-signature-ui

Add performance-signature-ui

src/main/resources/artifact-ignores.properties

@@ -73,6 +73,7 @@ poll-mailbox-trigger      # renamed to poll-mailbox-trigger-plugin :(
 octoperf-jenkins-plugin   # released from wrong repository; will be renamed
 upload-artifacts-to-nexus # renamed, see https://issues.jenkins-ci.org/browse/HOSTING-41?focusedCommentId=250383&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-250383
 blackduck-installer		  # deprecated
+performance-signature-ui  # plugin not hosted in public repository
 
 # rogue releases with unknown source
 ez-templates-1.0.0