Added simple NUS downloading interface

modules/nus.py

@@ -0,0 +1,22 @@
+# "nus.py" from libWiiPy-cli by NinjaCheetah
+# https://github.com/NinjaCheetah/libWiiPy-cli
+
+import libWiiPy
+
+
+def download_title(title_id: str, title_version_input: str = None):
+    title_version = None
+    if title_version_input is not None:
+        try:
+            title_version = int(title_version_input)
+        except ValueError:
+            print("Enter a valid integer for the Title Version.")
+            return
+
+    title = libWiiPy.download_title(title_id, title_version)
+
+    file_name = title_id + "-v" + str(title.tmd.title_version) + ".wad"
+
+    wad_file = open(file_name, "wb")
+    wad_file.write(title.dump_wad())
+    wad_file.close()