improve docstrings

Author: ufechner7

src/solver.jl

@@ -49,6 +49,7 @@ end
           log=false, reference_point=zeros(MVec3))
 
 Main solving routine for the aerodynamic model. Reference point is in the kite body (KB) frame.
+See also: [solve](@ref)
 
 # Arguments:
 - solver::Solver: The solver to use, could be a VSM or LLT solver. See: [Solver](@ref)

src/wing_geometry.jl

@@ -112,7 +112,8 @@ function init!(wing::AbstractWing; aero_center_location::Float64=0.25, control_p
 end
 
 """
-    add_section!(wing::Wing, LE_point::PosVector, TE_point::PosVector, aero_model, aero_data)
+    add_section!(wing::Wing, LE_point::PosVector, TE_point::PosVector, 
+                 aero_model, aero_data::AeroData=nothing)
 
 Add a new section to the wing.