added try/except on sanitize import to point user to my fork
added xls_to_csvs script to proj and setup py and added reqs in setup.py
	modified:   setup.py
	new file:   src/spartan/scripts/__init__.py
	new file:   src/spartan/scripts/xls_to_csvs.py
	modified:   src/spartan/utils/spreadsheets.py