Go package to make ASCII line graphs

I hate to be "that guy," but that's not ASCII.

Nice work. I personally have great appreciation for tools that do one task and integrate well. This is the kind of a tool you don't know you need until you're querying vague search terms on your search engine of choice.

nice. there are similar packages for other eco systems like node.js. it makes sense that go gets its own.

Good work. Sad that terminals still don't support even basic graphics though. It's 2018!