As an User I want a pipeline run be triggered automatically after I push code to my (central) code repository, so my changes are automatically pulled through the pipeline

_As an User_
_I want a pipeline run be triggered automatically after I push code to my (central) code repository_
_so my changes are automatically pulled through the pipeline_

**Acceptance criteria**
- Must be a separate micro-service called 'pipe-listener'
- Must accept [GitHub Post-Receive Hooks](https://help.github.com/articles/post-receive-hooks) calls (HTTP POST)
- Must be standalone, not depending on an external webapp container like Tomcat (eg. use embedded Jetty instead)
- Must clone each triggered pipeline into a separate directory
- Must use 'pipe' as the pipeline runner
- Must be able to execute multiple pipelines in parallel