Use variable names to generate Columns interface.

[PatrickDattilio]

I'm currently using schematic in combination with Retrofit (and Gson) and I thought the Column interface seemed like boilerplate we could generate using the variable names, or the SerializeName annotation used by Gson. Has any thought been given along this line? I'd be glad to take a further look if you think this is a decent idea, I'd greatly appreciate if you could point me in the right direction!