wizard: set next button default
qrscanner: use win.show_qr_code
unify util.parse_URI
minor fixes
import paymentrequests only when really needed
show color if payment request has expired
show expired status in invoices tab
fix
minor fix
fix: payment_request
new widget: QRTextEdit
fix: expiration in invoices
fix: qrtextedit constructor
use QRTextEdit for public and private keys
receive tab, separate from addresses tab
show list of requests in receive tab
parse_URI: amount is in satoshis
Litecoin: remove alocoin.org from default servers
Merge remote-tracking branch 'upstream/master'

Conflicts:
	gui/android.py
	gui/gtk.py
	gui/qt/__init__.py
	gui/qt/main_window.py
	gui/qt/seed_dialog.py
	lib/util.py
	plugins/qrscanner.py