Update licence file with Powershop attribution
Update licence file with Powershop attribution

ajesler/jenkins-job-git-branch-extension,ajesler/jenkins-job-git-branch-extension,ajesler/feckless-octo-succotash,ajesler/feckless-octo-succotash,ajesler/feckless-octo-succotash,ajesler/jenkins-job-git-branch-extension