Feature Request: Import chapter information from Final Cut Pro XMEML files

Final Cut Pro XMEML project files are produced by old versions of Final Cut Pro (up to version 7, before Final Cut Pro X) and are also supported by other programs like Adobe Audition. XMEML files can contain marker information in <marker> elements that can be used to create chapter marks in Podlove Publisher.

        <marker>
          <name>MARKER_TITLE</name>
          <in>NUMBER_OF_SECONDS</in>
          <out>-1</out>
          <comment/>
        </marker>

Feature request: add FCP XMEML file import support to the Podlove Chapter Library.

Specification: https://developer.apple.com/library/content/documentation/AppleApplications/Reference/FinalCutPro_XML/DTD/DTD.html#//apple_ref/doc/uid/TP30001157-TPXREF104