Wind Models

[olrosales]

Implementing some wind models to be able to simulate wind in any direction. I think a good foundation could be matlab model.

I think we need, at least:

 - Horizontal wind.
 - Wind shear. (It is necessary to study the difference between this one and the previous one).
 - Gust Model
 - Turbulence model (Maybe Dryden)

Find matlab model examples:
(https://es.mathworks.com/help/aeroblks/wind.html)

Find MIL-F-8785C paper:
(http://everyspec.com/MIL-SPECS/MIL-SPECS-MIL-F/MIL-F-8785C_5295/)

[AlexS12]

Hi @olrosales,

I think after the merge of #104 we will be much more prepared to pick up the wind models again. What do you think? Are you still interested on accomplishing this task?