New menu system

[thelusiv]

Hmmm, well Irrlich does a lot more than just a GUI, it is a full OpenGL toolkit, which would duplicate a lot of the functionality already in VDrift.The trouble with using a library for a GUI is always that it is either very big and tries to take over your application, or that it has a strange license, or that it is not very well written, or doesn't do exactly what you want. Also, a lot of times it is not cross-platform, even if it uses SDL or something many times the authors don't test on many platforms so the code is not really cross platform after all. Thus it takes a lot of effort to use many of the existing SDL based GUI libraries. I have yet to find one that satisfies all my requirements for VDrift in terms of portability, performance, simplicity, and quality.Also, to add yet another thing to the list of things the menu system must be able to do: Dialog boxes, or pop-up windows which contain widgets. These will be mostly for situations where the user's attention needs to be drawn to something.