Give a slightly better error message when we fail to process.
Read message peer from database.

Read the message hub information from the database (banks). Remove the
-m command line switch. Remove leftover debug.
Add postgresql-contrib to the dependency list as we only really just add
the new functions to pgcrypto, the old will still be needed to work.
Remove debug
Rename sendbankmessage to bankapi to prepare for more general usages.
Remove the usage of JSON in communication.

Read the POST data directly and use this as ciphertext. Respond by
simply responding. Use HTTP response codes and reasons for communicating
the status for the request. 200 OK will return a valid messagebody.
Remake the command to start being a multi usage tool.

Make the first argument to the script be the command to execute, this to
prepare for adding more functions into the script.
Allow the old behavior to be preserved using the "send" command.
Rename the api cgi to bankapi.py
Update name and demo to match new reality.