SIDL reminders in generated files?

[teuben]

If certain files (e.g. bmi-c/bmi.h) are generated via the bmi.sidl and some procedure, this fact should be a comment in those files, as to yet again remind authors of the proper workflow.

openjournals/joss-reviews#2317

[mdpiper]

@teuben On a slightly tangential point, the language spec files (like bmi-c/bmi.h) are created manually. However, it would be a really good idea to generate them programmatically. @mcflugen and I are scoping out the work for this now.

[teuben]

given #71 this can be closed I guess.

[mdpiper]

Thanks, @teuben!