Merge pull request #730 from vjuranek/label_cast_exception

[FIXED JENKINS-17128] Unquote labels before processing
Merge pull request #729 from vjuranek/fix_pull646

[FIXED JENKINS-17084] Changelog should produce output even if some chang...
Add changelog recored for pull #729 and #730
[FIXED JENKINS-16608] View name should not allow "..".
Support skips with hash syntax.
hudson.scheduler.BaseParser.hash=true by default: @daily should not necessarily mean 12:00 AM.
Test & I18N for checkSanity.
Merge branch 'master' into cron-hash-JENKINS-17311
fixing loose-ends as pointed out by Jesse
[FIXED JENKINS-17331] PerJobLocalRepositoryLocator should prefer the MavenModuleSetBuild.workspace for single-module builds.
Merge branch 'master' into cron-hash-JENKINS-17311
added to online help about concurrent builds: a paragraph about using the hudson.slaves.WorkspaceList system property for configuring the separator
Promote use of crontab hashes in documentation and form validation.
Merge pull request #744 from m2spring/master

updated online help for concurrent builds
i18n & l10n(ja) for HudsonPrivateSecurityRealm
[maven-release-plugin] prepare release jenkins-1.507
[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