Add asset dumper

scripts/AssetDumper.py

@@ -0,0 +1,16 @@
+import sys
+import os
+from unitypack.asset import Asset
+
+
+if len(sys.argv) < 3:
+	print("This tool dumps assets from asset files for use in diffing\nUsage: " + sys.argv[0] + " assetfile.assets outputFolder\nWill extract all assets from the input file and write them to outputFolder/####.dat")
+	exit()
+
+with open(sys.argv[1], "rb") as assetsFile:
+	asset = Asset.from_file(assetsFile)
+	for id, obj in asset.objects.items():
+		assetsFile.seek(obj.data_offset)
+		data = assetsFile.read(obj.size)
+		with open(os.path.join(sys.argv[2], str(id) + ".dat"), "wb") as outfile:
+			outfile.write(data)