fix bug #718
fix bug #717
separate AmountEdit and BTCAmountEdit classes, for exchange rate plugin
fix: missing import
replace fiat dialog with direct edit line
setAmount: convert to int
exchange rate plugin: bi-directional conversion
sanitize get_amount
fiat_e: set precision to 0.01
AmountEdit: use a separate palette for the help text
option to start hidden. fixes #720
restore encrypt/decrypt menus
add new files and deps to setup
pyasn1_modules.rfc2459 requires pyasn1-modules
Merge pull request #721 from atweiden/pyasn1-modules

pyasn1_modules.rfc2459 requires pyasn1-modules
get_amount returns None if there's an exception
use BTCAmount.setAmount instead of setText
fix: wrong variable name fee_e
improve fee help message
column for payment request memo