[babl] Created tag BABL_0_1_60

[Øyvind "pippin" Kolås <ok src gnome org>]

The unsigned tag 'BABL_0_1_60' was created.

Tagger: Øyvind Kolås <pippin gimp org>
Date: 1541804316 +0100

    0.1.60

Changes since the last tag 'BABL_0_1_58':

Ell (1):
      cairo: accelerate R'G'B'A u8 -> cairo-ARGB32 conversion

Øyvind Kolås (8):
      post-release version bump
      babl: palette, improve assert in pala_to_rgba
      babl: make babl_model_is deal with NULL input
      babl_space_get_icc: permit passing NULL for return length
      babl-image: thread-proof single item cache of babl-images
      babl: permit registering model conversions for non-rgb models
      docs: fix typo
      release 0.1.60