save working folder every time it is changed
add explict plot_marker() function
save pre1, pre2, norm1, norm2, make sure pre1 and norm2 are within range
many fixes for XAS viewing
add a check for unsafe attributes that have no need in larch but can cause crashes
more fixes for scanviewer
more updates to scanviewer
renamed to avoid conflicts with other specfile library
rm specfile
support for older hdf5 map files (v1.3.0)
line profiles (currently)  not supported for 3 color maps
change working folder (and save) on Read Map
version to 0.9.22
updated version
add check for NANs in dead-time correction
some small fixes for XDI / columnfiles
some small fixes to scanviewer.py
some improvements in displaying background XRF spectra
better xrf_plot() with mca2 (background)
improved display of background XRF spectra