MxNotificationManager and MxParam initial work. (#78)

* MxNotificationManager initial work.

* Add .swp files to .gitignore.

* Checkpoint before anything too crazy with param

* Cleanup and add MxParam.

* Checkpoint for everything except MxNotificationManager::Register.

* Add int return type to MxCore::GetId instead of relying on implicit function nonsense.

* Add stlcompat.h so this can still be built on modern compilers, fix affected type size asserts.

* Switch to Mx types

* Add BUILD_COMPAT option to CMake so the project can still be built with modern compilers.

* Change vtable14 and vtable18 to Register and Unregister in MxTickleManager.

* Remove last unsigned int reference to id type.

* Remove MxList, use one inherited class per type. Improves accuracy again.

* Address compiler compatibility code review.

* Match MxNotificationManager::Register.

* Re-enable MxNotificationManager DECOMP_SIZE_ASSERT.

LEGO1/mxcore.h

@@ -31,8 +31,13 @@ public:
     return !strcmp(name, MxCore::ClassName());
   }
 
+  inline MxU32 GetId()
+  {
+    return m_id;
+  }
+
 private:
-  unsigned int m_id;
+  MxU32 m_id;
 
 };