new submit of wq.py

This is slightly edited version of what is on the workque tutorial
(changed the number of tasks to 542 (the number of file chunks we create
with chunkfile.sh with the number of lines equal to 100,000.  i.e. : (sh
chunkFile.sh test1_density_grid.txt 100000))
added in processFiles.sh and JoinFiles.sh to manifest.

processFiles.sh we may not end up using since that is the task wq.py
will be performing. Maggie, Ana please look at it anyways...just to
understand what the "tasks" are that wq.py need to do.