I fixed the blockers issues pointed by Kris and some users (~suv and Jabier) successfully compiled the branch in their systems (MAC OS X and a Debian with disabled deprecated GLib features).
But... nobody gave me green light to merge commits. Anyway, I have commits right in the Inkscape repository and I wanna know if it's okay for me to do that (blocker issues with the merge are resolved).
I'm not as good with bzr as I am with git and I don't want to postpone this merge too much. If the branches diverge too much I'm not sure if I'll be able to merge them.
I think the only missing test is the CMake integration, but I cannot compile Inkscape with CMake in my system (even before these changes), then I cannot test.
I really liked Kris knowledge and I wanted to wait for his approval before do the merge, but him seems to be very busy and I don't know when he'll have time to look in my code again. Current integration is done and after any update to libdepixelize all I need to do is update its local copy in Inkscape (no changes required to the Inkscape code itself).