Updated GUI and MenuGUI classes

GUI class - made default size of menu larger to accommodate the extra
gui elements. have left a comment of the old menu sizes incase it needs
to be changed back

MenuGUI class - added final validation to detect for whitespace.
finished player setup screen layout with all the necessary GUI elements
added. they're not functional yet though
Merge branch 'master' of https://github.com/jbrookdale/GroupAGSAssignment5