core:
 * Compability fix for Forms
 * Fix fetching of Objects failing in some cases
 * Fix clearing date in Annot setModified/setDate
 * TextSelectionPainter: support glyphless fonts
 * Splash: Don't try read past end of image
 * avoid abort() on large memory allocation
 * Fix memory leak on broken files
 * Fix potential invalid memory read
 * Small code improvements

qt5:
 * Document TextAnnotation::inplaceAlign
 * Make Annotation::setModification/CreationDate work on existing annots
 * Be a bit more stubborn converting dates that come from xml
 * Clean as many null characters from the end as possible when converting strings

glib:
 * Add accessor functions for PopplerAttachment
 * Deprecate PopplerAttachment GTime fields
 * Deprecate PopplerDocument date properties

utils:
 * pdftoppm: report error and exit if output file cannot be written
 * Document that PDF-file can be '-' to read it from stdin

build system:
 * cmake: Modern way to link against libpng, zlib and libtiff
 * cmake: Remove stray support for lcms1 in pdftocairo