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_e_hz.cpp

@@ -1917,7 +1917,7 @@ int daE_HZ_c::CreateHeap() {
     J3DModelData* modelData = (J3DModelData*)dComIfG_getObjectRes("E_HZ", dRes_INDEX_E_HZ_BMD_HZ_e);
     JUT_ASSERT(2479, modelData != NULL);
 
-    mpMorfSO = new mDoExt_McaMorfSO(modelData, NULL, NULL,
+    mpMorfSO = JKR_NEW mDoExt_McaMorfSO(modelData, NULL, NULL,
                                     (J3DAnmTransform*)dComIfG_getObjectRes("E_HZ", dRes_INDEX_E_HZ_BCK_HZ_WAIT_e), 0, 1.0f,
                                     0, -1, &mSound, J3DMdlFlag_DifferedDLBuffer, 0x11000084);
 
@@ -1938,7 +1938,7 @@ int daE_HZ_c::CreateHeap() {
         return 0;
     }
 
-    mpBgW = new dBgW();
+    mpBgW = JKR_NEW dBgW();
     if (mpBgW == NULL) {
         return 0;
     }