Update load.py to load binford societies
Add function to load binford variables
Increase VariableDescription.label width to 25
Fix field name for categories.
Binford variables now load
Implement reading of binford codes
Skip CODEs that start with class:
Also ignore 'Value' codes
change clear_ea to clear_cultural

SInce this is not just EA
Reformat load_all_datasets and add placeholders
Reorganize load script into a package
fix typo in clear.py, clear VariableCategories
Tweak error message on society value
Implement loading of bf data
Increase coded_value field width to 100
Update load_all_datasets with bf_vals
Postprocess binford values
Merge pull request #64 from NESCent/binford

Load scripts to import binford society data