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_swpush.cpp

@@ -91,7 +91,7 @@ bool daObjSwpush::Act_c::create_heap() {
     JUT_ASSERT(569, bg_data != NULL);
 
     bool bVar2 = false;
-    mpBgW = new dBgWSv();
+    mpBgW = JKR_NEW dBgWSv();
     if (mpBgW != NULL && mpBgW->Set(bg_data, 0) == 0) {
         bVar2 = true;
     }