Log Message:
Changes 4.1.4:
** New Commandline Options
- The introduction of additional blend color spaces in the Development
  Branch requires a new option to select them.  Here, in the Stable
  Branch, the new option `--blend-colorspace' just duplicates the
  functionality of `--ciecam' and `--no-ciecam'.  The Stable Branch
  does *not* provide the additional blend colorspaces of the
  Development Branch.  The following equivalences hold
      --ciecam     <=>  --blend-colorspace=ciecam
      --no-ciecam  <=>  --blend-colorspace=identity
  Both options `--ciecam' and `--no-ciecam' are deprecated in 4.2 and
  will be withdrawn in 4.3.  Thus, users should prefer
  `--blend-colorspace'.

** Bug Fixes
- [Enblend and Enfuse] Fix the nesting-depth counter for response
  files.  This bug prohibited to load more than 20 images in a single
  response file.
- [Enblend and Enfuse] Allow grayscale images to bring their own
  (grayscale) profiles.  Previously grayscale images with ICC profiles
  were rejected.
- [Enblend] Fix a possible domain error followed by a division-by-zero
  in the seam-line optimizer.
- [Enblend and Enfuse] Avoid an undeserved warning about incompatible
  colorspaces if they only disagree on their meta-data (e.g. profile
  creation date/time).
- [Enblend] Fix a bug in the Dijkstra Optimizer which could lead to
  undefined behavior in the placement of the (optimized) seam line.
- [Enblend] Fix a non-dereferencable vector iterator which led to a
  segfault.
- [Enblend] Avoid a division-by-zero in the Annealing Optimizer.
- [Enblend] Fix a bug (1356551) in the seam-line vectorization code
  that was there since 2004.  The fix changes the position of almost
  any coarse-mask seam line vertex by one pixel.