[VoxBo] Getting region stats from the command line

[Thad Polk]

Is there an easy way to get the average value (& other obvious descriptive 
statistics) from a region (specified from a mask) in a .cub?

I looked at vbdumpstats but it doesn't seem to work on .cub files, but 
rather requires a full GLM.  vbregion seems close but doesn't output the 
average value and also lists all the regions it can find rather than the 
region specified by the mask.

Thanks,

Thad