These classes are moved to .wallet:
- Wallet + WalletTest
- WalletExtension + WalletExtensionsTest
- WalletProtobufSerializer
- UnreadableWalletException

These classes are moved to .wallet.listeners:
- WalletEventListener
- WalletChangeEventListener
- WalletCoinsReceivedEventListener
- WalletCoinsSentEventListener
- WalletReorganizeEventListener
- ScriptsChangeEventListener
- AbstractWalletEventListener
- KeyChainEventListener
- AbstractKeyChainEventListener