hwhw/kindlepdfviewer — pull request #640 by chrox (2012-11-26 14:32:15+00:00)
Title: catchup: now kopt-backend is updated to master tree

Confirmed by:
```
git diff master:.gitmodules .gitmodules
git diff master:Makefile Makefile
git diff master:pdf.h pdf.h
git diff master:pdf.c pdf.c
git diff master:djvu.h djvu.h
git diff master:djvu.c djvu.c
git diff master:koptcontext.h koptcontext.h
git diff master:koptcontext.c koptcontext.c
```