New QR code linked to Peerunity donations

Old QR code was linked to a Bitcoin address. This new one is linked to
the address: PFWU1xDF1GaXFRUbC31gEXGHWyzAaweJcX which is the donation
address for Peerunity at: http://peer4commit.com/projects/74/donate
Fix typo.
Merge pull request #137 from glv2/typo

Fix typo.
Merge pull request #135 from sandakersmann/master

New QR code linked to Peerunity donations.

Independently confirmed that the QR code matches the expected address for the Peerunity project on Peer4Commit. Merging the change.
translation updates
Merge pull request #138 from CoinGame/peerunity.Translations

translation updates
Merge pull request #136 from glv2/multisig

Add multisig dialog.