headers cleanup, converted some function-only sources into proper class method files, more use of OOP power, removed some 'respondsToSelector' calls, moved defines into their own header, more use of objc categories

This prevents girders from erasing landbacktex (square windows in tunnels and such), at the cost of requiring lfBasic and lfObject to be treated the same apart from graphically

fix a couple of 'potential leaks'

rename the ios settings files into something more appropriate