adding script to convert xfel cxi files to simple hdf5
adding script to convert xfel cxi files to simple hdf5

CXI files are hdf5 with some formatting. The main dataset is written in two parts
and a single file only seem to contain a single frame.

This script slurps up a whole bunch of cxi files (in a dir do *.cxi), and extracts the
two image parts into a numpy array. The numpy array is then offset by the largest absolute
min value to get the whole dataset above 0 - and then converted into a uint16 which works a
lot better for compression algorithms.

ulrikpedersen/benchpress,ulrikpedersen/benchpress,ulrikpedersen/benchpress