@L730branch: Bug in *.cxi output.

[duaneloh]

In the output for *.cxi files, 'cheetah/configuration/detector0_geometryFile' and 'cheetah/configuration/detector1_geometryFile' are both saved as int8 arrays. Shouldn't this be a string?

Output from Python:
In [51]: f['cheetah/configuration/detector0_geometryFile'].value
Out[51]: array([ 47, 114, 101, ..., 0, 0, 0], dtype=int8)