Isolate JKRHeap operator overloads

Fixes #25

This isolates the JKRHeap operator new/delete overloads. Every single new/delete site in the code has been replaced with a macro.

Sadly for new[] and delete[] we have to keep global operators. The global new[] just allocates into malloc() however, and delete[] goes into free() if it's not in a JKRHeap. So that's fine.

src/d/actor/d_a_obj_rotTrap.cpp

@@ -85,7 +85,7 @@ int daRotTrap_c::CreateHeap() {
         return 0;
     }
 
-    mpBgW2 = new dBgW();
+    mpBgW2 = JKR_NEW dBgW();
     if (mpBgW2 == NULL || mpBgW2->Set((cBgD_t*)dComIfG_getObjectRes("P_kama", 8), 1, &mBgMtx)) {
         mpBgW2 = NULL;
         return 0;