Driver script
Make main thread wait for other threads before exiting
Integrated Jyoti's indentation fixes
Retries in contacting SGE services. More raising on unrecovable errors.
Print full trace for handled exceptions in threads. Print timestamp.
Temporarily disable generation of graphical files for dot because
dot was getting into endless loop (running for hours).
Replaced all tabs with 4 spaces in Python files
Replace remaining calls curses-only output with toPrint()
Increased limits on threads and files, set ulimit on files
Driver script for 454