[FYI] New public temporary branch, about documentation for custom test drivers

[Stefano Lattarini]

Hello Automakers.

I've pushed the documentation work I've done so far to the temporary
public branch "GSoC/experimental/docs-custom-test-drivers", in case
anyone wants to take a look at it (I had hoped to finish it this morning,
but I didn't, and I'll be AFK until this evening, so there's no point in
delaying even more).  Notice that that branch is bound to be amended and
rebased, and finally deleted (it won't be merged in the 'test-protocols'
branch, rather its changes will be re-applied on the top of that).

Regards,
  Stefano