Bugfixes related to Getting started - #263

So far this passes aatest_ds000114_fmri for me.

I tested this on my local machine (OS X 10.14 and R2018b). I'm still getting up to speed on CI. It's currently using a virtual Linux machine, yes? Will we eventually want to add virtual Windows and Macs?

It is possible to run CI on Windows and MacOS:
https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners

So far this passes aatest_ds000114_fmri for me.

I tested this on my local machine (OS X 10.14 and R2018b). I'm still getting up to speed on CI. It's currently using a virtual Linux machine, yes? Will we eventually want to add virtual Windows and Macs?

Yes, we do want to add Macs and some Windows. Some notes on that, probably better to discuss that in #272

@AljenU, Did not we agree on using pathsep instead of ":" in MATLAB path?

That will be part of the Windows-compatibility changes. For this set, it is only about changes for Getting Started on Linux.