Useful Maths Functions/Cleanup

Tarquin: Some work I'm considering doing in this area of the wiki:

• splitting this page up
• splitting up UnrealScript Vector Maths
• bringing the new set of pages under a new header page (for which I can't think of a name)
• adding a category tag for pages that have useful bits of code, perhaps "Category Cookbook".

Discussion

Sweavo: Cookbook tag is a great idea. Perhaps "Numerical Recipes" for a title? Or maybe just "Maths In Unreal Engine"