rename some variables and begin compiled sim c code

sim/compile.lua

@@ -3,34 +3,7 @@ local ffi = FFI or require("ffi")
 Simulation = Simulation or {}
 
 ffi.cdef[[
-	struct Wire {
-		int objref;
-		int layer;
-		struct Net* group;
-		int bounds[6];
-	};
 	
-	struct Port {
-		bool state;
-		char type;
-		struct Gate* gate;
-		struct Net* group;
-	};
-	
-	struct Gate {
-		int logic_ref;
-		bool in_queue;
-		struct Port ports[?];
-	};
-	
-	struct Net {
-		bool state;
-		bool in_queue;
-		int updatetick;
-		int state_num;
-		int num_gates_update;
-		struct Gate* gates_update[?];
-	};
 ]]
 
 function Simulation.compile(sim)