Add ability to set account path

Useful for nesting folders etc.

Provide sorted accounts slice

Add citi parser

This parsers citi transaction html pages, because it exposes some info not included in the csv download.

Accept a list of cards per user

Use time.Equal for test

Refactor, change output format

Update test

Invert amount, now positive for debits, negative for credits

Split util.ParseDir functionality for reusability

Fixups

Make pfin.Transaction.Amount() consistent

Add chase parser

Wrap parser error with account and filename

Fix date spacing hack

Add initial readme

Update cmd/status

Rename util.TxString to FormatTx, refactor, move Fields to util

Move pfin.TxString to util, add formatting functions

Add parser/all metapackage, add category to other parsers

cmd/unpaid: Refactor, add category totals