[Ifeffit] Larch 0.9.57

[Matt Newville]

Hi All,
Larch version 0.9.57 has been released and is available on PyPI (
https://pypi.org/project/xraylarch).  It should now be installed by
default using most installation mechanisms, and you may see a notice to
update if running xas_viewer.

The updates are described in some at
https://github.com/xraypy/xraylarch/releases/tag/0.9.57
and in the github commit history.  This includes adding support for reading
RIXS data files from ESRF BM16, better support for de-glitching in
XAS_Viewer, and fixing of reading of many Athena Project Files that were
saved in the "old style" and have non-ASCII characters (the code now
correctly reads the 78 Project files at
https://github.com/xraypy/xraylarch/tree/master/examples/xafsdata/AthenaProjectFiles
).

Much of the work for this release has come from Mauro Rovezzi. In a
conversation we had yesterday about this release, we talked about several
potential changes going forward, especially for XAS_Viewer, about saving
processing history, how to improve the concept of "reference spectrum" for
a measurement, and other topics related to keeping track of analysis
history and provenance.  Some of these ideas are encapsulated in Github
Issues at https://github.com/xraypy/xraylarch/issues, and the plan is to
work on this.  One possibility would be to be able to read and export to
Athena Project files but use a different format (probably HDF5) as a new
default "Larch Project File" so that more complexly nested data and some
sort of "journal" per data set could be saved, displayed, edited, and so
on.

If anyone here has some thoughts on how such topics could or should be
handled, please let us know.  If you have other ideas on what might be
added or improved, also don't hesitate to speak up, either in conversations
here or on Github.

Cheers,

--Matt Newville
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