add thin wrapper for getting files

corrlib/tools.py

@@ -1,3 +1,5 @@
+import os
+import datalad.api as dl
 
 
 def str2list(string):
@@ -15,3 +17,10 @@ def m2k(m):
 
 def k2m(k):
     return (1/(2*k))-4
+
+
+def get_file(path, file):
+    print("Loading data...")
+    dl.get(os.path.join(path, file), dataset=path)
+    print("> downloaded file")
+