Revision 1005350

Bugzilla #49379:
Added ability to embed an external AFP page segment resource file (AFP output only).
Submitted by: Peter Hancock <peter.hancock.at.gmail.com>

Changes to patch:
- Replaced AFP parsing code with a more universal MO:DCA parser (as discussed).
- AFPDocumentHandler: addressed a TODO (clearing of the page segment map was not necessary for each page)
- AFPDocumentHandler: merged pageSegmentMap and pageSegmentUriMap by creating a combined object: PageSegmentDescriptor