Expose csv-parse options in body parser

[paolochiodi]

I'd like to be able to set some of the options of the csv parser used internally by csv-parse, especially relax_column_count.

I know that I can override some of the default options with request headers, but not everything is exposed and not everything should be left to the client to decide

(reposted from restify/node-restify#1167)

[DonutEspresso]

Sounds like we need to give more ability to pass through options to the underlying parser - this sounds reasonable to me.

[DonutEspresso]

Seems like we should tackle this as part of #7

[retrohacker]

Migrating back to restify/node-restify#1167