improve linear static aerodynamic example

[mvanzulli]

This issue aims to:

• Suppress null force imposed in this example
• Add a boolean setting to consider reference geometry (dt=0) to compute aerodynamic force. In this case there is non geometrical linearity taking into account for computing aerodynamic force.
• Fix aero force if only one type of coefficient is added.
• Add angle of attack domain where coefficients are valid.
• [ ] Imporve performance of the example by only computing aerodynamic force when is needed.

[mvanzulli]

Fix aero force if only one type of coefficient is added completed in this commit.

[mvanzulli]

Suppress null force imposed in this example fixed in this commit

[mvanzulli]

Add a boolean setting to consider reference geometry (dt=0) to compute aerodynamic force was don in this commit

[mvanzulli]

The restrictions imposed to the aerodynamic coefficients was done in this commit

[mvanzulli]

Closed by #353

[mvanzulli]

Reopened to fix this example according to new assembler.m inputs