Merge branch 'release/poc5-rc2'

ethereal/assets/ext/big.js

ethereal/assets/ext/ethereum.js

ethereal/assets/ext/pre.js

ethereal/assets/ext/string.js

ethereal/assets/muted/index.html

ethereal/assets/qml/newTransaction/_new_contract.qml

ethereal/assets/qml/newTransaction/_simple_send.qml

ethereal/assets/qml/webapp.qml

ethereal/assets/samplecoin/samplecoin.html

ethereal/ethereum.go

ethereal/ui/gui.go

ethereal/ui/library.go

ethereal/ui/ui_lib.go

ethereum/ethereum.go