[AolCrypto]
1. add AES-CBC and sha256 functions in c code using lib crypto
2. modify function prototypes of DES functions
3. cosmetic change
[AolCrypto]
1. change constants to private from global in AolRSA
[AolCrypto]
add AolSymCrypto Class.
This is designed to common super class of Symmetric Key Crypto Classes (AES, DES...)
[AolCrypto]
modify AolDES Class to inherit AolSymCrypto
[AolCrypto]
add AolAES
[AolCrypto]
add AolHash class using sha256
[AolCrypto]
1. add AES, SHA test functions
2. modify DES test function, because of updating DES Class
3. modify RSA test function, because of updating swift rules