wrap all library code into namespace if VCMI_LIB_NAMESPACE is defined

preparation for having client and server in a single process

lib/mapObjects/ObjectTemplate.h

@@ -12,6 +12,8 @@
 #include "../GameConstants.h"
 #include "../int3.h"
 
+VCMI_LIB_NAMESPACE_BEGIN
+
 class CBinaryReader;
 class CLegacyConfigParser;
 class JsonNode;
@@ -153,3 +155,5 @@ public:
 	}
 };
 
+
+VCMI_LIB_NAMESPACE_END