Fallback temp files to OS temp directory

[apgrc]

Closes #66.

Maybe this should be the default path?

[apgrc]

Run make test | grep Errors but I don't see any errors.

[mochaaP]

I think this is very likely to break linters that require path resolving in order to work (which is why this feature existed in the first place). I think a better workaround is to add an override for certain generators to run mkdir -p before actually executing the external command.

[apgrc]

Those linters would break because the file buffer does not exist, not because of the location of the temp_file, right? If that is the case, how would running make -p solve the problem? The user would need to also save the file.

Do you have some examples of linters that break on those cases?