core:
 * More work on rendering of standalone Annot Widgets. Issue #806
 * Fix crashes in embedded file handling on broken files. Issue #967
 * Fix uninitialized memory read on broken files
 * Save a bit of memory in Dict data

cpp:
 * Fix crashes in embedded file handling on broken files. Issue #966

utils:
 * pdftohtml: HTML and XML output includes font opacity.

qt5:
 * Rename ArthurOutputDev to QPainterOutputDev

build system:
 * Fix linker error when gtk is not in a default location
 * Add some checks for gtk-doc support
 * Reorganize GObject introspection config
 * Enable CMAKE_LINK_DEPENDS_NO_SHARED