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
fixed typo in setup.py package_dir option
changed req url for sanitize
added req.txt to install my specific fork/branch of sanitize
changed reqs file to point to a https url vs ssh
	modified:   src/spartan/utils/spreadsheets.py
src/spartan/scripts/xls_to_csvs.py:
- added optional output directory argument
Merge branch 'dev'