addressing code review comments
warning manager needed to be initiated from a constructor.  fixed terrain in multiRobotTest.  quieted lots of warnings.  added some known issues
handling missing dependencies.  quieting more warnings
fixed some logic bugs in the force gradients.  zapped inertia check in parseInertial, since a better test happens at compile time (only warning about important bodies with no inertia).  quieted more warnings.  cleaned up error reporting.
more minor fixes, quieting warnings
warning manager needed to be initiated from a constructor.  fixed terrain in multiRobotTest.  quieted lots of warnings.  added some known issues
merge