SNOwGLoBES 1.3 Compatibility

[Storreslara]

Currently the channel file structure for custom binning breaks SNEWPY's channel.dat dataframe. This is due to the 'SN_nu' tag put in the beginning of each line (needed to use a the custom binning postamble file ).

To get rid of the SN_nu tag while making the df use the following code

df_chan = pd.read_csv(path_chan, sep=" ", header=None)

if df_chan[0][0] == "SN_nu":
    df_chan.drop(df_chan.columns[0], axis=1, inplace=True)
    
# then you can add the col names.. 

[JostMigenda]

Another change in the new SNOwGLoBES version is going to be that efficiency and smearing files are in detector-specific subdirectories, so we need to update the file paths in SimpleRate._load_efficiency_vectors() and SimpleRate._load_smearing_matrices() accordingly.