Convert SendBitcoinsWindowController.xib to auto layout.
Add constraints so window can resize cleanly.
Shorten redundant German label.
Fix wrong German translation.
Convert HIContactsViewController.xib to auto layout.
Add constraints so window can resize cleanly.
Update HITransactionsViewController.xib.
Fix wrong "send" label in Italian translation.
Use unicode heavy plus symbol instead of image so we have a hope of wrapping correctly.
#85: Some i18n fixes.