Fix cmakehdf5 so that it can figure out where the source directory is.
It expects cmakehdf5 itself resides at $srcdir/bin/cmamkehdf5.
Tested: Jam by invoking cmakehdf4 with different paths.
different language API's and testings. See "cmakehdf5 --help" for details.
Tested: jam using different combinations of option and verified correctness
by inspeacting libhdf5.settings output.
Changed to use the quick steps described in INSTALL_CMake.txt.
Previous version is available by --old.
Added a help page to explain how to use.
Added a fix to figure out the current HDF5 version and use that to find the
correct file for install. (Still need to figure out the platform name.)
Tested: Jam and Platypus. Both failed in the installed steps because
the Cmake produced HDF5-1.8.13-Linux.sh even though the version number is
1.8.13-snap3. Committed it so that Allen can fix the version number error.
This has been developed and tested in the trunk branch and is
now made available in the v1.8 branch.
Tested: Linux (Jam), linux 64 (koala), ppc64 (ostrich), Mac (fred, duck and Owl) passed.
Failed in SunOS (linew). Will fix when the new Sun is available.
