Help with constructing an npeg parser

[PMunch]

You're welcome :) Npeg can be a bit tricky to get the hang of, but once you've 
got it it's a really nice library. And the speed of the resulting parser is 
really good considering how easy it is to use! To parse it into JSON all you 
need to do is change how the `Record` type is generated, should be pretty easy. 
Not sure why you're going via JSON to HTML though.