[poppler] Poppler 0.16.0 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-0.16.0.tar.gz

Changes against the 0.15.3 release:
core:
 * Improve the correctness of radial shadings (Bug #32349)
 * Adapt the zlib-based FlateStream code to API changes  (Bug #32065)
 * Make PreScanOutputDev be less agressive when deciding to rasterize (Bug 
#30107)
 * Fix some warnings in newer gcc in Splash backend
 * Fix the preliminary bbox/clip calculation in Splash backend
 * Use A1 instead of A8 for imagemask in the Cairo backend
 * Windows compile fixes

utils:
 * Do not return 99 (or 1) with -h, -v and -printenc (Bug #32149)
 * Misc style improvements to pdftohtml code
 * pdftohtml: Remove the -resolution flag introduced in 0.15.0 and fix the
              existing -zoom flag

build system:
 * Add more warning flags to the default gcc builds
 * Enable GObject introspection support in the cmake build system

qt4:
 * Windows compile fixes

Testing, patches and bug reports welcome.

I've also created the poppler-0.16 branch for fixes for the upcoming 0.16.x 
releases

Albert