Performance as a function of wind velocity

[mjwagner2]

Heliostat tracking error (and possibly slope error) increases with wind velocity, so it may be important to capture wind speed during design or performance calculations. The interface should be modified to allow specification of relevant error mechanisms as a function of wind velocity, and take specification of wind velocity as an input on the performance simulation page. Data exported to SAM might also be modified to include some functional dependence on wind velocity, with a form TBD.