Add. AES encrypter.
Add. `set_inc_mode` to AES CTR encrypter.

```Lua
-- Implement FileEncrypt aes encrypter
function CreateAes(key)
  local enc = aes.ctr_encrypter()
  enc:set_inc_mode("fi") -- firward increment
  enc:open(key, '\1' .. ('\0'):rep(15))
  return enc
end
```