Improved cryptography handling:
- Divided CryptoEngine into smaller modules;
- Improved PRX decryption (implemented all PRX decryption types);
- Fixed several bugs in SAVEDATA handling and improved hash generation in PARAM.SFO;
- Added new keys;
- Cleaned up code in general.

Added gzip compressed file handling for PGD files in IoFileMgrForUser.

Partially implemented scePauth_F7AA47F6 and scePauth_98B83B5D.

Added new findings for VAP command in VideoEngine.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3403 4ab978e6-3352-0410-996c-0b42db0051c8