Merge branch 'release/0.5.15'

.gitignore

README.md

ethereal/assets/debugger/debugger.qml

ethereal/assets/ext/ethereum.js

ethereal/assets/qml/QmlApp.qml

ethereal/assets/qml/test_app.qml

ethereal/assets/qml/wallet.qml

ethereal/assets/qml/webapp.qml

ethereal/ethereum.go

ethereal/flags.go

ethereal/main.go

ethereal/ui/debugger.go

ethereal/ui/gui.go

ethereal/ui/html_container.go

ethereal/ui/qml_app.go

ethereal/ui/ui_lib.go

ethereum/cmd.go

ethereum/ethereum.go

ethereum/flags.go

ethereum/javascript_runtime.go