Add ability to skip N header rows

[ohthehugemanatee]

My bank (Deutsche Bank) puts a bunch of crap in the top few rows of the CSV file. Things like my account number, date downloaded, and a warning message that transactions not yet cleared are not included. They are very definitely Doing It Wrong.... but it seems like it would be easy (and might resolve issue #3, too) to have an input for how many header rows to use.

The guy from Issue #3 can say "0", and I can say "6". In case header rows > 1, really we just take row n -1 to be the start of the file and accept the header row there.

[0xErnie]

This is fixed in a fork cjhowald@bdae90f