Brought changes from the trunk into the branch.

For the top level, brings in changes for configure.ac, configure and the MANIFEST:

   svn merge -c25286 https://svn.hdfgroup.uiuc.edu/hdf5/trunk .
   svn merge -c25287 https://svn.hdfgroup.uiuc.edu/hdf5/trunk .
   svn merge -c25290 https://svn.hdfgroup.uiuc.edu/hdf5/trunk .

For the fortran level:

   384	17:00	svn merge -r25235:25272 https://svn.hdfgroup.uiuc.edu/hdf5/trunk/fortran
   389	17:01	svn merge -r25284:25432 https://svn.hdfgroup.uiuc.edu/hdf5/trunk/fortran

For the fortran merges, I skipped changes relating to hyperslab selection since the C source has not been merged from the trunk yet. These changes should be in place in the fortran source when the C source is merged to the 1.8 branch.