Add boot-code "base" to ISO-build

[sm8ps]

As explained in the thread "dCore-xenial missing libraries", I think the ISO-build should not seek for an existing tce-directory. So I suggest using the boot-code "base" instead of the current "cde". (I hope that I have correctly understood Misalf's explanations.) What do others say?

[sm8ps]

Upon further reflection I have realized that with this boot-code one would not be able to easily side-load extensions. Better than miraculously loading extensions from a different installation, though. Still, does anybody have a better idea?

[Misalf]

I thought you were talking about booting via USB stick?
The thing is that Linux doesn't know where it booted off of. So there has to be some kind of searching for the tce dir or it needs to be explicitly specified if more than one exist on available devices.

[Jason W]

Both of you are correct I think.  Core does not include the cde nor base bootcode in it's plain ISOs, and I have removed the cde bootcode from the plain dCore ISOs, cde only belongs with dCorePlus.  So now regular dCore ISOs should behave the same as Core ISOs.  Thanks for the find.  Uploading new images now.

[sm8ps]

Thanks, Jason ans Misalf! I updated the wiki page about the installation from ISO with notes on how to side-load wireless extensions.