Need page describing possible "CAM_CONFIG_OPTS" arguments

[nusbaume]

It would be beneficial to add a new page or section to this documentation listing out what arguments are allowed in the CAM_CONFIG_OPTS XML variable in env_build.xml, what they do in CAM-SIMA, and what variables they map to in the ConfigCAM object.

In a perfect world we would find a way to autogenerate this documentation from the code itself, but for now adding them manually should be fine (as there shouldn't be a significant increase in the number of arguments anytime soon).