Changed h1_summary/h1_summary2 to write a timestamp that is centered on the time bounds.

h1_summary and h1_summary2 previously wrote out a timestamp representing the
last time entry in the last file to be summarized. Now, to follow convention,
the timestamp is recomputed as the mean of the first and last time_bounds,
where the first time_bounds value is the first value from the first time
entry in the first file and the last time_bounds is the second value from
the last time entry in the last file.

#!/bin/bash

source /opt/modules/modules/init/bash

# for robin1

#module unload PrgEnv # replaced with PrgEnv-x1

module unload PrgEnv-x1

#module load pgi/6.1

#module load netcdf_pgi/3.6.1

module load netcdf_gcc/3.6.1

# for phoenix

#module load netcdf/3.5.1_r4

#

module list