Add thornlist default to defs.local.ini.simple

[Barry Wardell]

If a user doesn't specify a thornlist, they only the Cactus flesh is built, but SimFactory doesn't warn that this is the case. I think that if you don't specify a thornlist, it should be an error/warning.

Additionally, I think it would be helpful to add something like

[default] thornlist = manifest/einsteintoolkit.th

to defs.local.ini.simple to make things easier for new users.

Keyword:

[Ian Hinder]

The thornlist has been added to defs.local.ini.simple in revision 1021.

In revision 1021, omitting the thornlist leads to the error:

"Error: machine macbook is missing a required key: thornlist".

It would be better if this was before the configuration step, but not critical. However, suggesting that the *machine* is the place for the thornlist is bad. Instead, I have detected the missing thornlist condition and added the error message:

Error: No thornlist supplied. Use --thornlist <thornlist> on the command line or set thornlist = <thornlist> in the [default] section of defs.local.ini.

in revision 1022.