protractor: resize browser window to 640x480 on startup
protractor: resize browser window to 640x480 on startup

Our layouts should work on small screens (mobile devices) and this
also makes the tests take up less desktop real estate.

mgeisler/swift-browser,zerovm/swift-browser,zerovm/swift-browser,mgeisler/swift-browser,mindware/swift-browser,mindware/swift-browser