create tool to generate jobs to create probability map overlay images

[coleslaw481]

This tool should be named createprobmapoverlayjob.py and it should be called like so:

createprobmapoverlayjob.py (options of probability map overlay creation)

The above script should take a completed CHM job and use information in that job to generate a new set of tasks to run on a cluster. These tasks (1 per probability map) should take the probability map, filter based on options set by caller and then overlay that probability map onto the original raw image with color and opacity defined by the user.