[FIXED JENKINS-25499] Updated icon-set dependency to version 1.0.5

Also fixes JENKINS-25498
[maven-release-plugin] prepare release jenkins-1.594
[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 1.596-SNAPSHOT
maven-hpi-plugin 1.110
Merge branch 'master' into build-number-is-id-JENKINS-24380
Added a tool to reverse the build directory migration if required.