Reimpliment Code Generation in go

[errm]

#58 introduces some code generation as a ruby script that pulls some data from AWS pricing API and documentation. It would be nice to reimplement this using go tools.

Looks like these are some good candidates:

https://github.com/gocolly/colly - scraping framework
https://github.com/dave/jennifer - code generation

[mtpereira]

Having that running on CI and opening a PR with the intended changes would be gold!

[errm]

Oh yeah sweet... In fact we could do that without even doing the rewrite!