This is the copy of the XADMaster framework that was implemented into iComics v1.1 onwards.
It has been stripped down to the bare elements required to function, and certain methods have been modified to align with the iComics codebase properly.
Per the LGPL agreement, it is publically avaialble here, for free.
XADMaster was originally created by Dag Ågren, with the original codebase featured in The Unarchiver.