Glorious new data, which has now been corrected so that USD is the base

 On branch master
 Changes to be committed:
   (use "git reset HEAD <file>..." to unstage)

	modified:   data/AUD.npy
	deleted:    data/CAD.npy
	modified:   data/EUR.npy
	modified:   data/GBP.npy
	new file:   data/cad.npy
	new file:   data/chf.npy
	new file:   data/jpy.npy
	new file:   data/nzd.npy
	new file:   data/raw/fxhistoricaldata/NZDUSD_day_fxhistoricaldata.zip
	new file:   data/raw/fxhistoricaldata/NZDUSD_day_fxhistoricaldata/NZDUSD_day.csv
	new file:   data/raw/fxhistoricaldata/USDCAD_day_fxhistoricaldata.zip
	new file:   data/raw/fxhistoricaldata/USDCAD_day_fxhistoricaldata/USDCAD_day.csv
	new file:   data/raw/fxhistoricaldata/USDCHF_day_fxhistoricaldata.zip
	new file:   data/raw/fxhistoricaldata/USDCHF_day_fxhistoricaldata/USDCHF_day.csv
	modified:   fxhistoricaldata_parser.py
	new file:   test_curve_arithmetic.py