More updates to the GUI (old version).
Replaced old menu code with HTML/CSS based menu system.
Modifed .css files accordingly.
Adjusted Menu() object accordingly with a test example.
Updated menu, added destroy() function.
Fixed font imports, added text label support to Menu.
Menu positioning is now generic for all elements.
Only implemented for text labels so far.
Menu can now center and right-align buttons as well.
Finished provisional "game menu".