Updated README
Added -Djava.awt.headless when executing unittests
JENKINS-21123 TokenMacro for PIPELINE_VERSION
Merge pull request #67 from steve-jansen/default-view-support

Fixes JENKINS-23282: support delivery pipeline view as the default view
JENKINS-23353: fixes creating new jobs from the default view

avoids a stack overflow exception when creating a new job from the default view
when a Delivery Pipeline view is configure as the default system view