Added public interface of BlockCipher.
Added AES.
Added Twofish.
Added two convenience methods.
Updated README.md.
Added missing doc.
Renamed "blockcipher" package to "cipher".
Added more interface to BlockCipher.
Added CBC.
Removed BlockCipher from public interface.
Updated doc.
Added PKCS#7.
Updated tests.
Rearranged package structure.
Improved tests.
Update README.md
Updated tests.
Updated docs.
Checked paddings.
Added CFB.