Undo BIND(C) addition.



git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@25920 dab4d1a6-ed17-0410-a064-d1ae371a2980
- wrap MPI 3 usage with MPI_VERSION compile time check.
- build out unbuffered stdout/err for windows



git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@25921 dab4d1a6-ed17-0410-a064-d1ae371a2980