Build out data parsing package

[sjwhitworth]

Having a useful set of parsing packages makes life a whole lot easier for people. We should aim to natively support at least JSON and CSV from the start.

[macmania]

i think there's a go google group that is parsing JSON data. What type of file format are you thinking of? I'm guessing we don't want it to be tied down to a particular format. Unicode and ASCII could be a problem when trying parse characters. So for now, we want to support structured datasets right?

[sjwhitworth]

Yes. Structured is good.