Implemented tab view for judgepage

Previous version of judgepage displayed 2 scripts side-by-side; the problem was that each script only gets 45% of the maximum possible width and that made some large scripts hard to read. There are 3 tabs: Left, VS, Right. VS tab is default and that tab displays the original format of having both scripts side-by-side. Left tab will only display left script, thus, making it easier to read; same goes for Right tab