- This header has no extern "C" {} and so can't safely be included from C++
- Not needed anywhere in headers, just in the C code which uses MetaIO
- LIGOLwXMLRead: add forward declarations of MetaioParseEnvironment and
  MetaioParseEnv, change enum METAIO_Type to unsigned int
Original: e949c9ad3080aba36b560140891e72e9e9413367