More cleanup

aclocal.m4

autom4te.cache/output.0

autom4te.cache/output.1

autom4te.cache/output.2

autom4te.cache/requests

autom4te.cache/traces.0

autom4te.cache/traces.1

autom4te.cache/traces.2

m4/acx_mpi.m4

m4/acx_pthread.m4

m4/ax_cc_maxopt.m4

m4/ax_check_compile_flag.m4

m4/ax_check_compiler_flags.m4

m4/ax_check_zlib.m4

m4/ax_compiler_vendor.m4

m4/ax_ext.m4

m4/ax_func_posix_memalign.m4

m4/ax_gcc_archflag.m4

m4/ax_gcc_x86_cpuid.m4

m4/ax_lib_hdf5.m4