Compatibility with the API changes since petsc-3.3.0 release.
Fixes for disabling RTTI

Use libmesh_CXXFLAGS in CXXFLAGS when detecting compiler features

Report RTTI status in config summary
Our netcdf subpackage may need detected HDF5 info

Adding just HDF5_vars is probably better than adding in all our
optional packages at once.  This will need to get more complicated if
we add more subpackages and/or more dependencies shared with them.
Added some preprints from Feb 2013.

Added Bhalla 2012 conference paper reference.

Updated Griffith preprint link.

Updated PerfExpert reference.

Cleaning out old preprints.

Regenerated web page after recent citation updates.
Updating statistics for Feb 2013.
If we didn't find HDF5, unset HDF5 variables

Hopefully this fixes the regression Ataollah Mesgarnejad found.
LASPACK is OK
preserve return code