Removed obsolet macros from C++ API:
H5_NO_NAMESPACE, H5_NO_STD, __cplusplus
Leave OLD_HEADER_FILENAME because iostream.h might still be in use,
until further checking is done.
Platforms tested:
Linux/32 2.6 (jam)
Linux/64 (platypus)
Darwin (osx1010test)
Jelly
Description:
Adding user's test revealed a flaw in the fix.
Moved CommonFG's functions in Group to H5Location, so that they
could be called by objects that can be used to specify a location
Also, rearranged many "#include" header files to resolve conflicts.
Platforms tested:
Linux/32 2.6 (jam)
Linux/64 (platypus)
Darwin (osx1010test)
