The test file was using MPI-I/O functions that the MPICH test suite
allows us to enable/disable.  This patch moves the test to an iodir
format, so it is not run when configured with --disable-romio.

The correct longer term fix for this is to allow multiple conditions
to disable a given test.  For example, we could have configure set the
@enable_io@ macro to either '' or '#', and different tests that rely
on I/O would add them to the start of the line in the test file.  That
way, a test that uses both F77 and I/O would be disabled when support
for either one is not present.

Signed-off-by: Junchao Zhang <jczhang@mcs.anl.gov>

Use automake+libtool instead of simplemake+createshlib.  Parallel make
now works for real, and shared library creation should be more robust on
more platforms.  "make dist" now works, modulo building the documentation,
although for boring reasons we can't actually use it for the final
distribution tarball generation.

This is a massive change and without a doubt has some bugs in it.  We'll
work through them as we find them.

No reviewer.