Methods to retrieve CSV data as array or map

[stuioco]

Hi!

I added three methods to make iterating over CSV data possible from templating.

• csvAsMap - returns an array of maps of string representing the data in the CSV which makes this.fieldname possible: within an each block
• csvMatchingRows - is the same thing but filters records based on a fieldvalue and field to match
• csvAsArray - just returns the whole thing as an array of arrays of string.

I also changed the name of the previous parseCSV to fetchSingleFieldCSV (to be more descriptive given these new ones.)
I have not updated the documentation. Will do so once you've reviewed.

[tommysitu]

LGTM