Add custom property in level1.xml to know the type of any PhysicalEntity.
Add custom property in level1.xml to know the type of any PhysicalEntity.

Need to use this custom property in Parser.cpp.

Symptogen/Symptogen,Symptogen/Symptogen,Symptogen/Symptogen,Symptogen/Symptogen,Symptogen/Symptogen,Symptogen/Symptogen