implementing mksendmanytx

A simple argument parsing change from mktx to allow passing multiple recipients
implementing paytomany (untested)

Just like mktx/payto, this is only submitting the tx created in mksendmanytx
[Lite gui] Allow changing quote currency backwards with right click
Merge pull request #246 from PabloCastellano/master

Improve lite gui usability
whitespaces option in format_satoshis
confirmation dialog before sending large amounts
redefine do_send as a wrapper for send_tx
Added notifications when receiving a new transaction
Rework notify so it's thread safe
Reworked notification flow and combined multiple transactions into one notification
Make sure we specify dual-arch
Renamed to tray and added exit option
use self.base_unit()
update BIP32 to its final spec
try.. except wrapper for ncurses.set_curs
fix settings dialog in text gui
fix popup navigation
fix for empty addressbook
better backspace detection
Set the current balance in the tray icon