Dropping 'fringe' pixbuf loaders

[Matthias Clasen <matthias clasen gmail com>]

After several rounds of fixing overflow and allocation failure issues in various loaders this cycle, I'm reconsidering following the suggestion in https://bugzilla.gnome.org/show_bug.cgi?id=721372

  wbmp, tga, ras, qtif, pcx, ani... these are probably prime candidates for being removed.

Before doing so, I want to ask if anybody is willing to step up and maintain these loaders.  Note that even if we drop these from gdk-pixbuf itself, they can be maintained out-of-tree... one of the advantages of having loaders as modules.

Matthias