Rework lmc a bit to support labels in generated code. Add support for certain special funcall expressions, namely: if:else, isInteger? value and tail which translate to SEL ATOM CAR and CDR respectively

#{
	init <- {
		#[1 2 3 4]
	}
	
	main <- {
		if: (isInteger?: 1 | [(2 + 32 * 8) 3 4]) {
			42
		} else: {
			24
		}
	}
}