TODO

#1 --------------------------------------------------------------------

 get more historic currency exchange rates, e.g.:

 http://www.oanda.com/currency/historical-rates-classic?date_fmt=us&date=05/16/13&date1=05/03/13&exch=EUR&expr=USD&margin_fixed=0&format=CSV&redirected=1
 http://www.xe.com/currencytables/?from=EUR&date=2013-05-16

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#2 --------------------------------------------------------------------

validate transaction IDs against existing entries in the file, to
 - recognize cancellations etc to earlier transactions
 - avoid double bookings
 -> postponed for now for performance reasons; the hope is those cases
    are rare. at any rate, before annual closing, run full year paypal
	import and compare the gnc2csv outputs
 -> there is also now delete_txn.py to e.g. kill all PayPal
    transactions, or a certain range, and import anew

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#3 --------------------------------------------------------------------

Much too memory-hungry currently.

try:
 http://stackoverflow.com/questions/110259/which-python-memory-profiler-is-recommended
 http://tech.oyster.com/save-ram-with-python-slots/
 https://en.wikipedia.org/wiki/PyPy

#4 --------------------------------------------------------------------

Consolidate .pygnclib scripts

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#5 --------------------------------------------------------------------

Possibly consolidate with http://hg.furius.ca/public/ledgerhub/ ?

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