Make a script for deleting units

[cmazzio]

would do the following:

1. delete unwanted unit from HDf5 file "sorted_units" section
2. cd into emg/utils
3. run python emg_reload_raw_data.py
4. cd into blech_clust folder
5. run blech_post_process.py through belch_units_characteristics.py

[Mraymon5]

If you use the spreadsheet-based method for sorting and selecting units, I believe you can already do this by deleting the units from the sheet and then re-running blech_post_process.py (and on down the chain).

Dunno how that interacts with EMG, LFP, etc. though