update readme.txt
replace WebStyle with QHash<QString, QString>
remove Base class from WebPageOperation
use QHash<QString, QString> for element style properties
add const qualifier to const methods in WebPageOperation
rename WebPageOperation::existGame to gameExists
remove passing the window pointer because it is webView's window.
rename WebPageOperation::fullScreen to setViewMode
change WebPageOperation to a subclass of WebView
introduce p-impl in WebView
make WebView::viewMode as a property
move MainWindow::getGameImage to WebView::capture
introduce GameScreen class to handle game screen details
update recovering style propety logic when fullscreen to normal
Merge branch 'pr/11'