fix gtk gui, network dialog
fix: connection preferences were overwritten by wizard
add can_edit_fee option, and improve settings dialog
use QSpinBox
reorganize settings dialog
message should be tx fee per kb
show tx before broadcast
move mnemonic to separate class and use slush's wordlist. new commands: make_seed and check_seed
Merge remote-tracking branch 'upstream/master'

Conflicts:
	gui/qt/main_window.py
Litecoin: add Kraken and fix ExMoney