[JENKINS-10502] Option to make the build NOT fail if there is nothing to archive
fixed compilation error
Backwards compatibility added. Added allowEmptyArchive test
allowing subtype to create its own XStream

based on the conversation with Weltraumschaf (the DARCS plugin maintainer)
Added help-allowEmptyArchive.html. Did some cleanup in ArtifactArchiver and config.jelly
[FIXED JENKINS-17177] wrong build result in post build steps after failed pre build step in maven project
[maven-release-plugin] prepare release jenkins-1.506
[maven-release-plugin] prepare for next development iteration
updated changelog for release
updated changelog as a part of the release
merged back the RC branch
creating an RC branch
the trunk is toward 1.508-SNAPSHOT
JUnit 4.
Merge pull request #732 from pjrt/JENKINS-10502

[FIXED JENKINS-10502] Option to make the build not fail if there is nothing to archive
Merge branch 'master' of github.com:jenkinsci/jenkins
[JENKINS-10502] Noting.
Suppressing RedeployPublisherTest.testBug2593 on jenkins.ci.cloudbees.com.
JUnit 4.
createTmpDir → TemporaryFolder