Includes configuration files to enforce these rules on lib and
common. Of course, "common" *is* a modularity violation right now,
so these rules aren't as strict as I would like them to be.
I am calling the crypto library "crypt_ops", since I want
higher-level crypto things to be separated from lower-level ones.
This library will hold only the low-level ones, once we have it
refactored.
