More arrow types

[tebeka]

Support more arrow types (maybe auto generate)

[yonidavidson]

Will use Go generate.
@tebeka do we also want to generate the C++ code in this task?

[yonidavidson]

@tebeka looking for a simple generic template and found the most starred package is:
https://github.com/cheekybits/genny

Do you feel like adding this as a tool for us?

[yonidavidson]

After reading a bit more I can probably do c++ and go using go templates and generate.
We can generate more then 50% of our code IMO

[tebeka]

I'm +1 on auto generating as much code as possible. However keep the code simple, if strings/timestamp make the code complex - do it just for numbers.