There have been lots of cleanups, fixes of compiler warnings, bugfixes, and
general refactoring since 2.9.18, plus we have some new features:
* There are new Tpy and Tpr parameters, these allow the 'mosaic mode'
projection plane to be rotated relative to the panorama view.
* Added Hammer output projection, see: https://en.wikipedia.org/wiki/Hammer_projection
* Updated PSD functions to write PSB (large file) format too, note that this
functionality is part of the PTmender tool and not available to Hugin/nona
directly.
* Various bugs have been fixed in these projections: triplane output,
architectural output, orthographic output and Thoby input.
* Other bugfixes that may be noticed are: a check for invalid resolutions in
TIFF files, formating sequence for x86_64, cropping images that go outside the
image boundary, and PSD and PICT image format improvements.
* There have been fixes for building on various platforms: OS X 10.6/10.8,
automake 1.12, MinGW, cmake, Visual Studio 2010 and Visual Studio 2012+
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