DeACSM v0.0.15

• Add support for anonymous authorizations - just click "Create anonymous authorization" instead of "Link to ADE account". Thanks to JJTech0130 for telling me how these work. Fixes #9
• Add support for AdobeIDs of other authorization providers. Thanks to JJTech0130 for telling me how these work.
• Bugfix for ACSM files downloaded from Google Play Books (ACSM files without metadata node). Fixes #11
• Allow linking an existing anonymous authorization to a new AdobeID. If you have an anonymous authorization, either by importing it from ADE or by creating it with this plugin, you can link that authorization with an AdobeID by clicking the "Connect anonymous auth to ADE account" button. Note that this only works with new, unused Adobe IDs.
• Update dependency python-cryptography from 3.4.8 to 36.0.1
• Update dependency python-rsa from 4.7.2 to 4.8