little changes and fixes to the previous commit

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

ios major refactoring for ios settings, now they are presented differently on iphone/ipad, code is simplified and optimized, and ui is a little refreshed (eg. no more stuck selected fields)

infecting sheepluva's mission graphics with retina images

a little code cleanup

Fix build with .pro file

Oops, fix build

GameInfo needs room params copy

Introduce EngineInteraction module

translators missed me

fix hats of the AI team file for ios

fix issue #287, default cmake build type