Add support for pe_prolog and pe_epilog files

Send all command line args to the files to be run
Add script to remove empty *.pe* and *.po* files after running pe jobs
Scripts expect this 11 commandline arguments: $pe_hostfile $host $job_owner $job_id $job_name $pe $pe_slots $queue $stdout_path $stderr_path $merge_stderr

bin/pro-epilog_wrapper.sh

@@ -15,6 +15,6 @@ done
 FILESSORTED="$(echo ${FILES} | sort)"
 
 for FILE in ${FILESSORTED} ; do
-	${FILE} || exit $?
+	${FILE} $@ || exit $?
 done
 exit 0