added log_indent
only change log indent for registered packages
Export the log_indent_package function
Fix log indent for unregistered packages
Add macros to eliminate warnings without debug
Be more helpful with EXECUTE_ASSERT output
Support lua 5.2
Merge branch 'develop' into simplify
Fix duplicate AC_DEFINE in sc_mpi.m4
Enable MPI I/O by default
Clarify MPI option help string