Add dumper config as top level h5 attribute
Add the merged dumper config to the top-level group in the output h5 file. Closes #102 (closed).
To recover the config in python:
import json
import h5py
cfg_str = h5py.File('output.h5').attrs['config'] # read the string from the file
cfg_json = json.loads(cfg_str) # convert to json object
print(json.dumps(cfg_json, indent=2)) # pretty print config
Also removing some files that didn't get used anywhere.