Add build status for branch master

I had a look into how this is done for our own Jenkins instance and not unexpectedly it turns out to be utterly simple due to being readily provided by a plugin, namely the [Embeddable Build Status Plugin](https://wiki.jenkins-ci.org/display/JENKINS/Embeddable+Build+Status+Plugin).

I've installed it and the build status badge is henceforth available for all projects as outlined, i.e. _you'll see **Embeddable Build Status Icon** as one of items in the left menu navigation for a job_. 

This commit adds the build status for branch master directly under the description as shown in the image @mrdavidlaing referenced - in case you want to include the pull request builds as well, I'd think it would make sense to add a separate sub section _Status_ to allow for respective explanations.

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:information_source: - this commit also removes the defunct anchor surrounding the _Remote Development Boilerplate_ header.