Revert "variance control(on x axis)"

This reverts commit 59f31a0c9ed86fc3762788379840ae1eeb4ef57a.
Revert "Revert "variance control(on x axis)""

This reverts commit 0c8895e098d1f3d3b68ccb9b6eb0cdd3fc213ee7.

Conflicts:
	exampleControllers/shivaVarianceControlBrownianNoiseSimpleControl.html

mistaken!