Should enrico_weekly and enrico_survey use config files?

[cdeil]

I guess we should use config files for these parts also, but not for the things that are set via environment variables (such as location of weekly, preprocessed and auxiliary data files).

The reason I haven't for now with enrico_weekly and enrico_survey is that I couldn't figure out how to combine environment variables with a default config file.

It should also be possible to submit different sets of parameters to the cluster.