Updated the crypto engine:

- Updated AES and SHA-1 source code;
- Fixed a few code warnings;
- Implemented EDAT/SDAT decryption.

Started SPURS implementation:
- Added an internal SPURSManager class draft;
- Added several drafts for cellSpurs functions.

Implemented key.edat decryption in sceNpDrmIsAvailable:
- NOTE: Currently, the decrypted key.edat is stored under dev_hdd1/titleID and the user must replace this file in dev_hdd0. This behavior will change in the future as it's currently intended for controlled testing only.

rpcs3/Crypto/unpkg.h

@@ -1,6 +1,5 @@
 #pragma once
-#include "aes.h"
-#include "sha1.h"
+#include "utils.h"
 #include "key_vault.h"
 
 // Constants