automatically download nonzero datatype metadata

lib/config.py

@@ -2,8 +2,15 @@ import os
 import sys
 from pathlib import Path
 
+from lib import matrix
+
 try:
     DIR = Path(os.environ["SS_DIR"])
 except KeyError as e:
     print("ERROR: $SS_DIR not set")
     sys.exit(1)
+
+SS_ROOT_URL = "https://sparse.tamu.edu"
+
+
+