blunt trailing edge drag

[juddmehr]

For cases when bodies have blunt trailing edges, need to add associated drag to the thrust calculations.

Current Idea: It looks like this can simply be done the same way as the rest of everything. get the velocity at the midpoint of the panel, get the raw pressure coeff, add the delta pressure due to the rotor wake, the calculate the force on the panel
will require additions to the initialization function as well as some if's to the post-processing stuff and probably an additional function or two.

[juddmehr]

done.