Adding support for EncryptColumn on byte[] properties

[TalAloni]

Hi,
First of all thanks for the very nice project and NuGet package.
Since storing NVARBINARY is much more efficient than storing Base64 strings, and since some data that is being encrypted is byte[] to begin with, it would be really terrific if you could support adding the EncryptColumn on byte[] properties.
I can submit a PR if needed, I've already used byte arrays this way and it's very useful for many use-cases.

Thanks,
Tal