[babl] Created tag BABL_0_1_50

[Øyvind Kolås <ok src gnome org>]

The unsigned tag 'BABL_0_1_50' was created.

Tagger: Øyvind Kolås <pippin gimp org>
Date: Sun May 20 10:46:17 2018 +0200

    0.1.50

Changes since the last tag 'BABL_0_1_48':

Edward E (1):
      Fix an unimportant typo

Ell (3):
      babl-palette: speed up closest-color search
      babl-palette: initialize radii of default palette
      tests: fix palette-concurrency-stress-test

Jan Vesely (1):
      meson.build: Bump version to 0.1.48

John Marshall (7):
      Meson build: Improve SIMD assembly checking/use
      Meson build: Improve host environment detection / handling
      Meson build: improve doc generation
      Meson build: Tidy up code and improve readability
      Meson build: Improve git-version.h generation
      Meson build: generate png image files for docs
      Meson build: fixes for windows build

Øyvind Kolås (8):
      post release version bump
      babl: preliminary work to add float fast path to palette formats
      meson.build: synchronise with autotools version
      babl-palette: improvements toward palette accuracy
      babl-palette: fix regression in prefvious commit
      babl: use hashtable approach in double reference
      tools: code around gcc warning about 0 length format string
      release 0.1.50