Implement raw option

[AGhost-7]

This adds a raw option which will make each csv row parsed into an object containing two properties:

• raw: a string which is the original data that was parsed.
• row: an array or object (depending on other options used) which is the parsed row.

Fixes issue #85

[tejasmanohar]

I'd prefer parsed to row, but overall, +1 for this PR. Super useful for debugging.

cc @wdavidw

[wdavidw]

Thanks, why is rowBuf in line 163 and 167 and not just after line 160 ?

[AGhost-7]

@wdavidw For rawBuf I only clear it if I'm done with it. For line 163 and 167 it exits early so I clear it there, otherwise it gets cleared at line 183.

[AGhost-7]

@wdavidw Is there something wrong with the PR? At work this would be really useful for debugging data imports.

[wdavidw]

One thing, line 234, there is a reference to @raw which i dont see anywhere else.