Update or remove the comments at the top of the source files.

[krivit]

Many of them are severely out of date, and it's not clear what purpose they serve at this point. We could replace them with the "standard" Statnet copyright headers.

[CarterButts]

They make it a lot easier to figure out what goes where, and if they are out of date then the solution is probably to update them.

[martinamorris]

could someone link to an example from the code here -- i'm not sure which "source files" @krivit is referring to.