Wrap game resource info from the server

Also add function to get the diff archive (for faster updating)

Download function soon, although I can't make sure that the download function will work properly (like pause, resume download etc.)

worthless/classes/installer/voicepack.py

@@ -0,0 +1,12 @@
+class Voicepack:
+    def __init__(self, language, name, path, size, md5, raw):
+        self.language = language
+        self.name = name
+        self.path = path
+        self.size = size
+        self.md5 = md5
+        self.raw = raw
+
+    @staticmethod
+    def from_dict(data):
+        return Voicepack(data["language"], data["name"], data["path"], data["size"], data["md5"], data)