Removed BATCH_JOB_WORK_QUEUE_SHAREDFS and BATCH_JOB_XGRID
Factored dag_file_format and dag_file_list_format out of node prep,
to clarify what is going on.
Factored out dag_node_submit_retry.
Added lots of const.
Modified resource monitor wrapper to build on the existing command.
Wrapper option must insert a dag_file, not just a char *.
Man page for wrapper options.
Applied variable substitution to the fully elaborated command and files.
Updated manual.
Moved string_wrap into stringtools.
Merge branch 'makeflow-wrapper' of github.com:dthain/cctools into dthain-makeflow-wrapper