RSA sign verification library server side and client

FYI I hacked together a PHP script that generates the license key for the Unlocker class as dropin replacement for the command line utility in case your server can‘t execute binaries.

The RSA generated are compatible to the JUCE class (with only minor syntax changes like adding a comma between private and public key), so I am not sure you need to party around with embedding another crypto library just for handling RSA keys.