Airdrop claiming functionality
Exchange rates EUR/USD (How to get ISK?)
PeerDBDiscovery bug fix

	modified:   wallet/src/de/schildbach/wallet/Constants.java
	modified:   wallet/src/de/schildbach/wallet/ExchangeRatesProvider.java
	modified:   wallet/src/de/schildbach/wallet/service/BlockchainServiceImpl.java
	modified:   wallet/src/de/schildbach/wallet/ui/InputParser.java
	modified:   wallet/src/de/schildbach/wallet/ui/SendCoinsFragment.java
	modified:   wallet/src/de/schildbach/wallet/ui/SendCoinsQrActivity.java
	modified:   wallet/src/de/schildbach/wallet/ui/SendingAddressesFragment.java
	modified:   wallet/src/de/schildbach/wallet/ui/WalletActivity.java