[Meta] Transition to Jenkins Pipeline

[vdice]

This meta tracks the tickets needed to replace existing job definitions with in-repo Jenkins Pipeline representations:

• [ ] Transition first Workflow component repo to Jenkins Pipeline: https://github.com/deis/jenkins-jobs/issues/118
• [ ] Transition remaining Workflow component repos to using Jenkins Pipeline: https://github.com/deis/jenkins-jobs/issues/119
• [ ] Extract common logic used in Workflow component pipelines into the Global DSL library: https://github.com/deis/jenkins-jobs/issues/120
• [ ] Document new Pipeline/Jenkinsfile approach and how to use in existing/new repos: https://github.com/deis/jenkins-jobs/issues/121
• [ ] Replace remaining (non-component) jobs in jenkins-jobs with Pipeline: https://github.com/deis/jenkins-jobs/issues/122

Bonus/if still warranted: Wrap up global DSL into 'official' Pipeline plugin(s)

[Cryptophobia]

This issue was moved to teamhephy/jenkins-jobs#21