[gtk] (10 commits) Non-fast-forward update to branch image-loading

[Matthias Clasen <matthiasc src gnome org>]

The branch 'image-loading' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  6a7370c... Add code to load and save tiff files
  9b3f842... Load tiffs without gdk-pixbuf
  20109c3... Add tests for the tiff loader
  0fb66c0... Add gdk_texture_save_to_tiff
  6a70aa8... Use our png loader for content (de)serialization
  ac52d85... Use our tiff loader for content (de)serialization
  b09532d... Add contentserializer tests for textures
  e4450db... Add code to load jpegs
  20d9cd5... Load jpegs without gdk-pixbuf
  f384d8c... Add tests for the jpeg loader

Commits added to the branch:

  8bd5faf... Add code to load and save tiff files
  47b18e1... Load tiffs without gdk-pixbuf
  a1c7152... Add tests for the tiff loader
  d080fb0... Add gdk_texture_save_to_tiff
  186279d... Use our png loader for content (de)serialization
  765aa05... Use our tiff loader for content (de)serialization
  1860b48... Add contentserializer tests for textures
  7e72404... Add code to load jpegs
  11400dd... Load jpegs without gdk-pixbuf
  ba6d1de... Add tests for the jpeg loader