How I got go-spew to work with GopherJS

go-spew is a very handy library used for dumping arbitrarily complex data structures in a (roughly) human-readable format. This is immensely helpful when debugging or writing automated tests in programs. Coupled with a package like go-difflib, it can make comparing the expected and actual results of a test not only easy, but into something approaching fun. Much of my time lately is spent hacking on projects to be compiled by GopherJS, the Go-to-JavaScript compiler.