Qt5

Hello!
I've added a few features and fixed a bug or two, let me know what you think! WCGBrowser is great, my church uses it for our children's check-in kiosks. I first tried making Firefox, Chrome, and Midori do what I want, but they were too complex to work smoothly. Thanks for the simple and easy-to-modify browser.

My changelog lists everything I modified, let me know if you have any questions/comments. Thanks!