The crypto salt file is no longer a thing. Now the salt is merely
appended to the `crypt_file` as the last sixteen bytes. The salt
is read from the end of the `crypt_file` on subsequent decryptions.
Added a setting for enabling 'debug' mode, using `pdb` for dynamic
debugging in pappy sessions. When needing to debug a function, or
set of functionality add the conditional `if config.debug`, then
set an entry point for `pdb` using `import pdb; pdb.set_trace()`
May remove this functionality if not desired in the main project.
976287a67b