Break QuickCrypto out into separate module

The QuickCrypto script doesn't really give us much. We're not using it to obfuscate passwords anymore, since we're not storing username/password information (even locally) for users. We should break this module out and make Arbitrator not have this internally.

Locate the QuickCrypto and Arbitrator module definitions and inspect how QuickCrypto is imported or used. Trace the current internal relationship before separating the module, then verify that Arbitrator no longer contains QuickCrypto and that the standalone module still has the expected integration behavior.

Written by the indexing model from the issue text.