Restore cwsac2.py and cwsac2 csv files

Accidentally deleted in an earlier commit
Merge branch 'master' of github.com:jrnold/acw_battle_data

Conflicts:
	data/nps/cwsac2/cwsac2.json
	data/nps/cwsac2/cwsac2_battles.csv
	data/nps/cwsac2/cwsac2_commanders.csv
	data/nps/cwsac2/cwsac2_dates.csv
	data/nps/cwsac2/cwsac2_locations.csv
	data/nps/cwsac2/tocsv.py