win: fix scardError
win: disable flaky test
add TestListReaders()
win: wip switch to unicode apis
remove stray printf
win: add SCard{IsValidContext,Cancel,Reconnect}
win: add SCard{Begin,End}Transaction
win: use UTF16 readername
win: add SCardGetStatusChange
win: resolve t0/t1 io request addresses
win: add SCardTransmit
go fmt
win: add SCardControl
fix test log
win: add SCardSetAttrib
win: needed is len in characters not byte
win: add SCardListReaderGroups
win: fix ListReader{s,Groups}
skip tests if pcscd or card is not available
tests